12th Physics

Class 12th Physics All Chapter MCQ Test 2026

33

12th Physics Chapter 1 MCQ Test

तैयारी में दम हैं तो 25 में से 23 सही करों।

1 / 25

Plastic rod rubbed with fur and glass rod rubbed with silk

2 / 25

The ratio of electric flux density and electric field intensity is known as

3 / 25

The electric field intensity inside of hollow spherical charge conductor is

4 / 25

Which of the following has unit volt / metre?

5 / 25

Which of the following physical quantities is a vector

6 / 25

An electric dipole placed in a uniform electric field experience in general

7 / 25

When a body is charged its mass-

8 / 25

A surface enclosis and electric dipole the total electric flux over the surface is

9 / 25

If a sphere of bad conductor is given charge then it is distributed on

10 / 25

The total charge on an electric dipole is

11 / 25

Voltmeter measures

12 / 25

The force acting on Per unit charge is called

13 / 25

There are two identical spheres A and B .A is given +Q charge and b is given - Q charge

14 / 25

An electric dipole placed in a non uniform electric field experience

15 / 25

Positively charge body has

16 / 25

Debye is a unit of

17 / 25

Spherical conductor is charged the electric field intensity at its Centre will be

18 / 25

Quantization of charge indicates that

19 / 25

Force between two charged particle situated at a distance is F. If distance between the two is made half, then the value of electric force will be

20 / 25

There are two identical spheres A and B. A is given + Q charge and b is given - Q charge

21 / 25

SI unit of electric dipole moment is

22 / 25

A positively charge glass rod attract and object . The object must be

23 / 25

Which of the laws given the force between two charges at rest

24 / 25

Van De graaff generator is an electrostatic machine which produces

25 / 25

Electric field lines provide information about

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9

12th Physics Chapter 2 MCQ Test

तैयारी में दम है तो 37 में से 35 सही करके दिखाओं।

1 / 37

The work done by electric field on a charged taken from one point to another of an equipotential surface will be

2 / 37

When a body becomes negatively charged , its mass

3 / 37

Two capacitor each of capacity C are connected in parallel .The equivalent capacity is

4 / 37

The capacity of any conductor is

5 / 37

If an earthed conductor is brought near an insulated conductor then the capacity of insulated conductor?

6 / 37

In a region of constant potential

7 / 37

Three condenser each of capacity C are connected in the series then there equivalent capacity will be

8 / 37

The dielectric constant of water is-

9 / 37

Van de graff generator is used for producing

10 / 37

The electric dipole moment per unit volume of a dielectric medium is called

11 / 37

An electron of charged e coulomb passes through a potential difference of V volt its energy in joule will be

12 / 37

Linear charge density is equal to

13 / 37

If a dielectric slab is introduced in between the two plates of capacitor then its capacitance

14 / 37

A dielectric constant 6 is to be filled in the gap between plates of a parallel plate capacitor. what is the factor by which the gap should be changed to maintain the same capacitance?

15 / 37

If a proton is brought near another proten then its potential energy-

16 / 37

The dielectric constant of water is

17 / 37

Eight drops each of radius r and charge q of are merged to form a single drop . the ratio of the potential of big dropped to a small drop is

18 / 37

The capacitance of a parallel plate capacitor by the introduction of a dielectric between the plates of the capacitor.

19 / 37

Electric potential at the centre of a charged hollow metal sphere is

20 / 37

Three condenser of equal capacity C are connected first in parallel and then in series .the ratio of equivalent capacity in both conditions is-

21 / 37

When I show bubble is charged its radius will

22 / 37

When a medium of dielectric constant k fills the gap between the plates of a capacitor its capacitance compared to air filled state-

23 / 37

A point charge q is rotated around another point charge Q in a circular path work done by electric field on it will be

24 / 37

The net charge on a charged capacitor is

25 / 37

The loss of energy taking place due to sharing of charge between two conductors depends upon

26 / 37

If a dielectric is placed between two plates of a parallel plate capacitor, the value of capacitance-

27 / 37

Electric potential of earth is taken to be zero because the earth is good

28 / 37

The capacitance of a spherical capacitor is directly proportional to its

29 / 37

If the distance between the two charges is increased then the electrostatic potential energy of the charges

30 / 37

The value of electric field inside a charge is spherical conductor is

31 / 37

Potential gradient is equal to

32 / 37

The value of electric potential at a distance r from a point charge is

33 / 37

Dielectric constant for vacuum is

34 / 37

Sum of charges on collecting and conducting plate of a charged capacitor is-

35 / 37

Which are the following value of n is not possible in relation Q= ne?

36 / 37

The electric potential inside the charged the hollow sphere is-

37 / 37

The electric potential due to electric dipole at the point lies on the bisector of its axis is-

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5

12th Physics Chapter 3 MCQ Test

तैयारी में दम है तो 35 में से 33 सही करके दिखाओं।

1 / 35

The equivalent resistance of resistor in parallel combination

2 / 35

Colour code of carbon resistance for blue colour is

3 / 35

The value of red colour in colour code of carbon resistance is

4 / 35

The spacific resistance of a conductor increases with-

5 / 35

Which of the following is conserved is kirchhoff's law?

6 / 35

The algebraic sum of all current meeting at any point in an electrical circuit is

7 / 35

Value of green colour code on carbon resistance is

8 / 35

Electric current density is a

9 / 35

Wheatstone bridge compares

10 / 35

Which law follows the law of conservation of energy

11 / 35

The length of wire is doubled its conductance will be

12 / 35

Kirchhoff's loop rule is based on conservation of

13 / 35

Amphere hour is unit of

14 / 35

Amphere is equal to

15 / 35

Which of the following is the best conductor of electricity?

16 / 35

The length of wire is doubled its conductance will be

17 / 35

Kirchhoff's junction rule is based on conversation of

18 / 35

The electrical appliances in our houses are connected across supply switch in

19 / 35

Electric current is a scalar quantity because

20 / 35

Kilowatt-hour is unit of

21 / 35

Ohm's law is followed by

22 / 35

Which one is correct?

23 / 35

On cooling the resistivity of metals

24 / 35

Unit of electromotive force is

25 / 35

The resistivity of material of a conductor depends on

26 / 35

The motion of electron inside the conductor is

27 / 35

The value of yellow colour in colour code of carbon resistance is

28 / 35

As the temperature rises the resistance offered by metals

29 / 35

Colour code of carbon resistance for white is

30 / 35

Wheatstone bridge is used in the measurement of

31 / 35

Which of the following is the same in parallel connection of resistances?

32 / 35

Electric current is a

33 / 35

Ohm's law is valid when the temperature of conductor is

34 / 35

What is mainly measured by potentiometer?

35 / 35

Specific resistance for a wire depends upon

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12th Physics Chapter 4 MCQ Test

तैयारी में दम है तो 35 में से 33 सही करके दिखाओं।

1 / 35

A charged particle moves perpendicular to a magnetic field

2 / 35

When an ammeter is shunted , it's measuring range

3 / 35

For two magnetic force field tangent law holds good when the angle between them is-

4 / 35

A charge moving with uniform velocity produces-

5 / 35

To parallel conductors carrying current in the same direction will

6 / 35

Current sensitivity of a moving coil galvanometer is

7 / 35

The resistance of a galvanometer is Deep a current of 1% (or 1/100 part) of main current will pass through it if the shunt is

8 / 35

Resistance of ideal ammeter is

9 / 35

If any ammeter is shunted then the total resistance of the circuit

10 / 35

A charged particle is released from rest in a combined parallel electric and magnetic fields the motion will be

11 / 35

On using shunt , the sensitivity of galvanometer-

12 / 35

The law , governing the force acting between two electric charges known as

13 / 35

An electron enters perpendicularly to a uniform magnetic field the path of the electron will be

14 / 35

Where are charged particle enters a magnetic field, its kinetic energy

15 / 35

The magnetic field due to a long solenoid is

16 / 35

The S.I. unit of magnetic field or magnetic induction is

17 / 35

Magnetic field due to a toroidal solenoid is independent of

18 / 35

The force between two moving charges is

19 / 35

50 particle enters into a magnetic field at 30° with induction vector. It's path becomes

20 / 35

Tesla is unit of ?

21 / 35

A charged particle is given a motion along the magnitude field line . The force acting on the particle will be

22 / 35

Which are the following relation between 'G' the resistance of galvanometer and V the resistance of voltmeter is correct?

23 / 35

The unit of voltage sensitivity is

24 / 35

The resistance of ammeter is

25 / 35

When and ammeter is shunted its total resistance in the circuit

26 / 35

If the current in an ideal solenoid be doubled , the magnitude of magnetic induction at a point in the solenoid will

27 / 35

Current in two parallel wires are directed opposite to each other. These wires

28 / 35

A circular coil of radius r carries a current I. The magnetic field at its centre is B . At what distance from the centre on the axis of the coal the magnetic field will be B/8

29 / 35

Current sensitivity of a moving coil galvanometer can be increased by

30 / 35

Current sensitivity depends on

31 / 35

In a vertical wire current flows from lower to upper. If an electron beam is sent horizontally towards wire than deflection will be

32 / 35

The radius of a circular current loop is made double and the current is made half. the magnetic moment of the loop will become

33 / 35

Gauss is a unit of

34 / 35

If a current is passed through spring the spring will

35 / 35

Voltage sensitivity of a voltmeter is-

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3

12th Physics Chapter 5 MCQ Test

तैयारी में दम है तो 21 में से 19 सही करके दिखाओं।

1 / 35

Which is more appropriate material for a strong electromagnet?

2 / 35

The angle between magnetic meridian and geographical meridian is called

3 / 35

The value of magnetic susceptibility of vacuum is

4 / 35

Liquid and gases are not -

5 / 35

The angle between the magnetic dipole moment and magnetic induction at the axis of circular current is -

6 / 35

The origin of magnetism in a magnet is

7 / 35

The angle between the geographic meridian and the magnetic meridian is called

8 / 35

Which of the following is not a magnetic element of the earth at a place ?

9 / 35

At any point on the perpendicular bisector of a bar magnet

10 / 35

When magnetic moment of an oscillating magnet increases,  its time period will -

11 / 35

Which of the following has higher magnetic susceptibility

12 / 35

The magnetic field is strength of a magnet is the greatest at

13 / 35

The magnetic susceptibility of air is

14 / 35

Angle between the Earth's magnetic axis and Earth's geographic axis is about

15 / 35

The value of magnetic force field at the surface of earth is -

16 / 35

If a bar magnet is cut into two parts perpendicular to its length , for one part , which of the following will not change?

17 / 35

Magnetic lines of force of straight current are-

18 / 35

The apparent dip at a place is always

19 / 35

To make an electromagnetic material should have-

20 / 35

Direction of the magnetic induction at an axial point and magnetic moment of a bar magnet are

21 / 35

Iron is -

22 / 35

When the intensity of magnetic field is increased four times , the time period of suspended magnetic needle becomes.

23 / 35

Magnetic dipole moment is a vector quantity directed from:

24 / 35

The angle between total field and horizontal field in magnetic meridian at a place is called

25 / 35

Curie temperature is that below which

26 / 35

Nickel is

27 / 35

Copper is -

28 / 35

Which of the following will have negative magnetic susceptibility?

29 / 35

Which quality should be present for making permanent magnet?

30 / 35

The magnetic moment of a bar magnet is M . It is bent at 60° from middle then magnetic moment will become -

31 / 35

Which pair has the same S.I dimensions?

32 / 35

The resistance of an ideal voltmeter is -

33 / 35

The permeability of a ferromagnet

34 / 35

Ongoing from north pole to equator, the value of angle of dip

35 / 35

In making permanent magnet we use -

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1

12th Physics Chapter 6 MCQ Test

तैयारी में दम है तो 35 में से 33 सही करके दिखाओं।

1 / 35

Lenz's law is associated with

2 / 35

Lenz's law is derived from

3 / 35

Direction of Eddy current is obtained from -

4 / 35

Calculate the magnetic flux when the magnetic field is perpendicular to the surface area .

5 / 35

The role of self induction is equivalent to

6 / 35

The current passing through a choke coil is 5H age decreasing at the rate of 3A/s . The emf induced in coil is

7 / 35

The mutual induction of two nearby coins is 1.5 H. If in one of these coils, the current grows from zero to 20A in 0.5s, the flux linked with second qual changes by

8 / 35

Factors that affect the voltage generation in faraday's experiment is

9 / 35

SI unit of mutual induction is -

10 / 35

The working of an induction coil is based on the principle of

11 / 35

The rate of change of magnetic flux in a loop is equal to -

12 / 35

The SI unit of magnetic flux is

13 / 35

To convert mechanical energy into electrical energy are can use

14 / 35

Inductance is the

15 / 35

An inductor may store energy in its

16 / 35

Which physical quantity has SI unit Henry ?

17 / 35

The working of dynamo is based on the principle of

18 / 35

If a denial cell is connected across the primary coil, the change in flux in the secondary will be

19 / 35

Calculate the magnetic flux produced when the magnetic field is parallel to the surface area.

20 / 35

The relative motion between the magnet and the coil that is responsible for generation of

21 / 35

Magnetic flux per unit area is

22 / 35

A circular coil is held in vertical plane. Bar magnet is taken towards it with north pole towards coil. Direction of current as scene from the side of magnet is

23 / 35

The magnetic flux linked with a coil is changed from 1Wb to 0.1Wb in 0.1s. The induced emf is

24 / 35

The phenomena called electromagnetic induction was first investigated by

25 / 35

An induction coil gives

26 / 35

When the rate of change of current is unity, The induced emf is equal to

27 / 35

The principle of mutual induction is used in

28 / 35

Instrument which converts mechanical energy into electrical energy is -

29 / 35

Lenz's law is the result of which principle of conservation?

30 / 35

Which of the following is consequences of the law of energy conservation?

31 / 35

The law of electromagnetic induction was discovered by

32 / 35

When current in a coil changes from 5A to 2A in 0.1s then average voltage of 50V is produced. The self induction of the coal is

33 / 35

The law related with electromagnetic induction is called

34 / 35

SI unit of magnetic flux is

35 / 35

Magnetic flux is the

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1

12th Physics Chapter 7 MCQ Test

तैयारी में दम है तो 36 में से 34 सही करके दिखाओं।

1 / 36

For resonance condition in any L-C-R circuit, the phase difference between applied voltage and current is

2 / 36

In step up transformer, the value of current and secondary coil compared to primary coil is

3 / 36

The phase difference between current and voltage in only capacitive alternating current circuit is

4 / 36

Power factor is equal to

5 / 36

Inductive reactance for direct current is

6 / 36

Power factor for pure inductance is -

7 / 36

Power factor for wattless current is

8 / 36

If there are N1 and N2 turns in the primary and secondary coils respectively in a step down transformer, then

9 / 36

Efficiency of transformer is the ratio of -

10 / 36

The core of a transformer is laminated to stop

11 / 36

The face difference between the current passing through an inductor and voltage across the inductor is an a.c circuit is

12 / 36

For which of the following, capacitor works as infinite resistance?

13 / 36

L-C circuit is called-

14 / 36

Which of the following is correct for transformer  ?

15 / 36

The power factor of series LCR circuit is

16 / 36

The power factor of a series LCR circuit is

17 / 36

A choke coil has

18 / 36

A choke coil is used to control

19 / 36

Alternating current of 3A is the same as

20 / 36

An A.C circuit containing only resistance ,

21 / 36

An A.C circuit containing only resistance,  which is not correct.

22 / 36

Alternating current can be produced by

23 / 36

Alternating current shows

24 / 36

The frequency of A.C in India is

25 / 36

The power factor is for

26 / 36

Reactance of the capacitor with the frequency of alternating current.

27 / 36

The thermal effect of alternating current is practically

28 / 36

For long distance power transmission by using a transformer, the transformer at the source should be

29 / 36

Induction furnace is based on the principle of

30 / 36

S.I unit of impedance is -

31 / 36

Transformer works utilise

32 / 36

A transformer works on

33 / 36

Which of the following material is most suitable to be used for making the core of a transformer.

34 / 36

In LCR circuit energy laws in circuit is -

35 / 36

The core of transformer is laminated to prevent -

36 / 36

By use of a capacitor in induction coil, the emf in secondary is

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12th Physics Chapter 8 MCQ Test

तैयारी में दम है तो 35 में से 33 सही करके दिखाओं।

1 / 35

The electric field E , magnetic field B and speed of wave c are related together as

2 / 35

The average intensity I, mean energy density u and speed c of an electromagnetic wave in free space are related together as

3 / 35

The energy of an electromagnetic radiation is 13.2keV.  This radiation is related to which region of spectrum?

4 / 35

Electromagnetic waves can be -

5 / 35

Which of the following waves has a maximum frequency ?

6 / 35

Clouds reflect -

7 / 35

What is the phase difference between electric and magnetic fields in an electromagnetic wave ?

8 / 35

X-rays are capable of penetrating

9 / 35

Nature of electromagnetic waves is -

10 / 35

Which of the following prove that electromagnetic waves are transverse?

11 / 35

In an electromagnetic wave, the disturbance is (are)

12 / 35

Which is correct for velocity of light ?

13 / 35

Which type of e.m. wave is used for treatment of muscular strain?

14 / 35

Which one of the following is used to investigate the structure of solids?

15 / 35

Infrared rays are between the regions -

16 / 35

Which rays are used for cooking and heating -

17 / 35

The energy of an electromagnetic field is due to its

18 / 35

Which of the following help us for recognization of precious stone?

19 / 35

Which type of e.m. wave is used for purification of water?

20 / 35

Which of the following is not electromagnetic wave ?

21 / 35

Which of the following are used to make labs free from bacteria?

22 / 35

The phase difference between electric and magnetic fields in an electromagnetic wave is-

23 / 35

Which of the following is not shown by electromagnetic wave?

24 / 35

The phase difference between electric wave and magnetic wave in the electromagnetic wave is

25 / 35

X-rays are

26 / 35

Electromagnetic wave in free space is

27 / 35

Water molecule in foods have a rotational frequency in the range of

28 / 35

Nature of electromagnetic wave is -

29 / 35

According to the law of electromagnetism, the speed of electromagnetism in all the inertial frames is -

30 / 35

Maxwell equations represent four laws of electromagnetism. Maxwell amphere law relates

31 / 35

The ratio of the Speeds of microwaves and X-rays in vacuum is

32 / 35

A Displacement current is produced

33 / 35

Which is a wrong statement ?

34 / 35

According to Maxwell's hypothesis, changing electric field gives rise to?

35 / 35

Main effect of infrared waves is

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1

12th Physics Chapter 9 MCQ Test

तैयारी में दम है तो 35 में से 33 सही करके दिखाओं।

1 / 35

The focal length of plane mirror is-

2 / 35

When concave lens of glass is immersed in water , it becomes

3 / 35

Lesser beam is

4 / 35

To remove hypermetropia (long sightedness) lens used is-

5 / 35

Rainbow is a natural example of

6 / 35

When a Ray of light enters a glass slab its wavelength

7 / 35

The lens which is used to remove short sightedness is

8 / 35

Which of the following phenomena taken place when a monochromatic light is incident on a prism?

9 / 35

When any convex lens is drown into water then its power

10 / 35

The optical fibre works on the principle of

11 / 35

A convex lens is dipped in a liquid, whose refractive index is equal to refractive index of material of lens, then it's focal length will -

12 / 35

Which has larger difference in focal length between eye lens and objective lens ?

13 / 35

When the tube length of microscope is increased, it's magnifying power

14 / 35

Optical fibre communication is based on which of the following phenomena-

15 / 35

The power of a convex lens of focal length 10 cm will be

16 / 35

Or increasing the length of the tube of compound microscope, magnifying power

17 / 35

SI unit of power of lens is -

18 / 35

To overcome astigmatism lens used is -

19 / 35

An air bubble inside water works as-

20 / 35

Cylindrical lens is used to correct -

21 / 35

The power of convex lens of focal length 20 cm in dioptre is

22 / 35

Minimum distance between real image formed by convex lens and object is-

23 / 35

Magnification is the ratio of -

24 / 35

When there is a refraction of light then which of the following does not change?

25 / 35

The image formed by objective lens of a compound microscope is-

26 / 35

The radius curvature of plane mirror is

27 / 35

The final image in astronomical telescope is

28 / 35

Cause of mirage is

29 / 35

The magnifying power of a magnifying glass of power 12 dioptre is

30 / 35

When length of compound microscope increases its magnifying power-

31 / 35

The dispersive power of a prism depends upon -

32 / 35

The refractive index of diamond is about

33 / 35

The radius of curvature of a spherical mirror is 40cm . It's focal length will be

34 / 35

For which of the following pairs is the critical angle the smallest?

35 / 35

In plane mirror, the image is -

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12th Physics Chapter 10 MCQ Test

तैयारी में दम है तो 35 में से 33 सही करके दिखाओं।

1 / 35

Polaroid glasses are used in sunglasses because

2 / 35

Who discovered poisson's bright spot?

3 / 35

The phase difference of the waves for constructive interference of light is

4 / 35

The reason for the phenomenon of interference is

5 / 35

Huygen's assumed light wave to be

6 / 35

In a young's double split experiment if red light is replaced by yellow light the Fringe width

7 / 35

Interference of light is the redistribution of which of the following physical quantities ?

8 / 35

Which of the following confirms transverse wave nature of light ?

9 / 35

When two light waves interfere there at some points there is brightness and at some point there is darkness where energy goes at those point

10 / 35

The width of diffraction fringes is ______ to the width of interference fringes .

11 / 35

Polarization can be done of electric magnetic wave

12 / 35

When the distance between source of light and screen is increased the Fringe width

13 / 35

If a thin transparent sheet is placed before young's double slit then width of fringe

14 / 35

The wavefron due to a line source at finite distance from the source is

15 / 35

Which of the following will not cause of polarisation?

16 / 35

The phase difference of the waves for destructive interference of light is

17 / 35

The wave from due to a point source at an infinite distance from the source is

18 / 35

What is the geometric shape of the wavefron that originates when a plane wave passes through a convex lens?

19 / 35

What is the locus of all the particles in a medium vibrating in the same phase called?

20 / 35

Light waves coming from two electric bulb do not interfere because they are

21 / 35

The wave front due to and unknown source at an infinite distance from the source is

22 / 35

If in young's double slit experiment distance between split & screen is made half than width of fringe will -

23 / 35

The concept of secondary wavelets was given by

24 / 35

The resolving power of human eye in minute is

25 / 35

The nature of light waves is

26 / 35

Huygen's secondary wave principle is used to

27 / 35

The wavefront due to a point source at a finite distance from the source is

28 / 35

In the interference of waves

29 / 35

Which of the following factors does the intensity of light depend on?

30 / 35

Which of the following light phenomena confirms the transverse nature of light?

31 / 35

Light is a transverse wave because it shows

32 / 35

Two light sources are set to be coherent when both the sources of light emit light of

33 / 35

Which is used to produce polarised light?

34 / 35

The wave theory failed to explain

35 / 35

In interference there is redistribution of

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12th Physics Chapter 11 MCQ Test

तैयारी में दम है तो 35 में से 33 सही करके दिखाओं।

1 / 35

In photoelectric effect, the photoelectric current is independent of

2 / 35

The maximum kinetic energy of photoelectrons emitted ine photoelectric effect depends linearly upon

3 / 35

Work function of silver is

4 / 35

When light enters from one medium into another medium, which quantity does not change ?

5 / 35

Which of the following does the wave theory of light not explain?

6 / 35

The energy of a photon is 1MeV . Which part of electromagnetic spectrum will it belong to ?

7 / 35

Energy of photon is equal to

8 / 35

What does a cathode ray consist of?

9 / 35

Which of the following Photon is of greater energy?

10 / 35

Electron volt is a unit of

11 / 35

A photoelectric cell is a device which

12 / 35

Which one of the following deflected in electric field?

13 / 35

The nature that was established by Davisson-Germer experiment, was

14 / 35

If the intensity of the radiation incident on a photosensitive plate is doubled, how does the stopping potential change?

15 / 35

To beams one of red light and other of blue light of the same intensity are incident on a metallic surface to emit photo electrons which emits electron of greater frequency?

16 / 35

The photoelectric effect is based on the law of conservation of

17 / 35

For same wavelength of electron and proton which physical quantity will be same ?

18 / 35

Who gave the theory of quantization of electric charge?

19 / 35

Photon does not possess

20 / 35

If the intensity of incident radiation in a photo cell is increased how does the stopping potential vary?

21 / 35

The phenomena in which electrons are emitted from some metal surfaces when light falls on them is known as

22 / 35

De Broglie relation is true for all

23 / 35

An electron and a photon each have a wavelength of 1.00nm. which has greater momentum?

24 / 35

Work function of copper is-

25 / 35

Matter waves are associated with material particles only if they

26 / 35

Work function of copper is the order of

27 / 35

Work function is the energy needed to

28 / 35

And energy associated with a photon is 10keV. It belongs to

29 / 35

Photos are deflected by

30 / 35

How does retarding potential vary with the frequency of light causing photoelectric effect ?

31 / 35

Cathode rays behave like -

32 / 35

The emission of electrons does not occur in which of the following?

33 / 35

What happens to the kinetic energy of the emitted electrons when the light is incident on a metal surface ?

34 / 35

The momentum of a particle is doubled. By what factor is wavelength changed ?

35 / 35

An electron is accelerated by potential drop of V. The De Broglie wavelength will be

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12th Physics Chapter 12 MCQ Test

तैयारी में दम है तो 36 में से 34 सही करके दिखाओं।

1 / 36

The difference between the energy of an excited state and the energy of ground state is called the

2 / 36

The hydrogen uncertainty principle is -

3 / 36

The minimum orbital angular momentum of an electron in a hydrogen atom is

4 / 36

According to the uncertainty principle of an electron time measurement will become uncertain if which of the following is measured with high certainty?

5 / 36

According to Bohr's curi when electron jumps down from an orbit of higher energy to the third orbit, the spectral lines so emitted are called

6 / 36

Which of the following is not charged?

7 / 36

The Kinetic energy of the Alpha particle incident on the gold foil is doubled. The distance of closest approach will also be doubled

8 / 36

What is the ratio of minimum to maximum wavelength in the balmer series ?

9 / 36

According to the Rutherford's model of atom was

10 / 36

Which of the following did bohr use to explain his theory ?

11 / 36

The bohr model of atoms uses Einstein's photoelectric equation.

12 / 36

The helium atom does not contain -

13 / 36

The Rutherford's experiment confirm that

14 / 36

Which of the following series of the hydrogen spectrum lies wholly in ultraviolet region?

15 / 36

The binding energy of the hydrogen atom is

16 / 36

What did ratherford Alpha particle experiment prove?

17 / 36

Electrons in the atoms are held due to

18 / 36

The electrons of Rutherford's model would be expected to lose energy because

19 / 36

The significant result deduced from Rutherford's scattering experiment is that

20 / 36

The work done that must be done to remove an electron from an atom is called

21 / 36

The experiment that supported Bohr's idea that there are discrete energy levels in atoms and the process of photon emission, was

22 / 36

Which series of hydrogen spectrum does not lie in infrared region?

23 / 36

Why was Rutherford's atomic model unstable?

24 / 36

What is the valence electron in alkali metal?

25 / 36

All  energy States above the ground state are called

26 / 36

Who discovered the first spectral series?

27 / 36

Electrons in the atoms are held to the nucleus by

28 / 36

If an Alpha particle collides head on with a nucleus, what is its impact parameter ?

29 / 36

Which of the following series of hydrogen spectrum is in visible range?

30 / 36

Which source is associated with a line emission spectrum?

31 / 36

The Rutherford's scattering experiment discovered the existence of

32 / 36

Which of Bohr's result for H-atom is experimently wrong?

33 / 36

According to the classical theory, the circular path of the electrons is

34 / 36

According to the Rutherford's model of atom was

35 / 36

Which one is not divisible?

36 / 36

Hydrogen atoms are excited from ground state to the state of principal quantum number 4. Then what will be the number of spectral lines  observed?

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12th Physics Chapter 13 MCQ Test

तैयारी में दम है तो 36 में से 34 सही करके दिखाओं।

1 / 36

Which particle must be emitted with beta particle from nucleus?

2 / 36

Life of a fossil in estimated by

3 / 36

The values of N/Z for stable nuclei are :

4 / 36

Two nuclei of isobars of an element must have

5 / 36

First nuclear reaction has been done by

6 / 36

The number of neutrons in nucleus is -

7 / 36

X-rays are emitted in

8 / 36

Two nuclei of isobars of an element must have

9 / 36

Which of the following mass number related to Alpha activity ?

10 / 36

The specific binding energy of nucleus is ____then binding energy .

11 / 36

The constituents of nucleus are

12 / 36

The radius of a nucleus is

13 / 36

Atomic number decreases with the emission of Alpha particles from the nucleus by

14 / 36

Beta rays are deflected in

15 / 36

The usual constituents of a nucleus are

16 / 36

The time in which radioactive substance became half of its initial amount is called

17 / 36

Beta rays are fast moving

18 / 36

Mass defect per nucleon is called

19 / 36

Which of the relations is correct for radioactive atom?

20 / 36

The half life of radioactive nucleus is 20h. What fraction of original its activity Be just after 40h?

21 / 36

The mean life of a radioactive substance is 100 years. It's half life will be

22 / 36

X rays was discovered by

23 / 36

The unit of radioactivity is

24 / 36

The nucleus of any atom is made up of

25 / 36

Which of the following is correct for Alpha particle?

26 / 36

Gamma rays are similar to

27 / 36

The source of solar energy is

28 / 36

Which one of the following has maximum penetrating power ?

29 / 36

Which of the following is not a fundamental particle?

30 / 36

To isotopes of an element have equal number of-

31 / 36

The reason for high penetrating power of Gamma rays is

32 / 36

The quantities, which remain conserved in a nuclear reaction -

33 / 36

In nuclear reactors, the control rods are made of

34 / 36

The half Life period of a radioactive isotope is 5 years. After 15 years the fraction decayed will be

35 / 36

What is the unit of radioactivity?

36 / 36

The function of moderator in nuclear reactor is to

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12th Physics Chapter 14 MCQ Test

तैयारी में दम है तो 36 में से 34 सही करके दिखाओं।

1 / 35

The impurity element used for p type semiconductor is

2 / 35

At zero degree Kelvin the piece of germanium

3 / 35

In full wave rectification if input frequency is 50 Hz then output frequency will be-

4 / 35

When LED is reserved biased,

5 / 35

In a transistor ,the majority charge carries are communicated towards the base by the part

6 / 35

For NPN transistor is common base beta is 100 the current gain Alpha for common emitter will be

7 / 35

Junction transistor with back to back on junction was discovered by

8 / 35

Which one of the following logic gates is universal logic gate ?

9 / 35

Transistor can act as a switch in

10 / 35

Which configuration of transistor has highest voltage gain ?

11 / 35

Diode maybe used to

12 / 35

In N type semiconductors , majority charge carriers are

13 / 35

(1+1) in binary addition is

14 / 35

The group third element used asants for germanium and silicon gives us

15 / 35

Full wave rectifier uses

16 / 35

For obtaining p type semiconductor travelent material is mixed in germanium but for obtaining and type semiconductor which is fixed with ge-

17 / 35

To obtain an oscillator from an amplifier the type of feedback used is

18 / 35

The device to convert solar energy into electrical energy is

19 / 35

For semiconductors the gap between valence and conduction energy bands is

20 / 35

A P-type semiconductor is

21 / 35

The gap between conduction energy band and valence energy band is called

22 / 35

The minority current carry in p type semiconductor are

23 / 35

Main gate (basic gate) is-

24 / 35

With the increase of temperature,  the resistance of a semiconductor

25 / 35

The impurity to get p type germanium or silicon semi conductor should be

26 / 35

The temperature coefficient of a semiconductor is

27 / 35

For P-N-P transistor with common base , the value of Alpha is 0.98 , then common emitter current hain beta will be

28 / 35

In binary system 111 represent

29 / 35

Width of forbidden band is maximum for

30 / 35

The Boolean expression for AND gate is

31 / 35

A semi conductor is cooled from T1K to T2K , then its resistance will-

32 / 35

Majority carries in p type semiconductors are

33 / 35

Which of the following is the Boolean expression of OR gates

34 / 35

Unit of amplification factor of transistor is

35 / 35

Diode is used as

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12th Physics Chapter 15 MCQ Test

तैयारी में दम है तो 34 में से 32 सही करके दिखाओं।

1 / 34

For long distance radio broadcast mainly used means is

2 / 34

Radar system uses

3 / 34

The maximum electron density of the inosphere on a day is directly proportional to

4 / 34

Waves of UHf frequency are generally transmitted as

5 / 34

Range of UHf is

6 / 34

The communication suited to frequency about 40 mhz is by

7 / 34

Which is not an example of digital communication?

8 / 34

Space wave propagation , used in TV has a frequency range of

9 / 34

Modulation is of

10 / 34

Laser action needs

11 / 34

Which frequency range is used for TV transmission?

12 / 34

Superimposing information single on carreir wave is called

13 / 34

Information in AM wave is contained in

14 / 34

The height of geostationary Satellite from the ground is

15 / 34

Range of microwaves is

16 / 34

In amplitude modulation-

17 / 34

On a particular day the maximum frequency reflected from the ionosphere is 10 mhz on other day it was found to increase to 11mhz .the ratio of maximum electron density of the ionosphere on the two days density of ionosphere on the two days is

18 / 34

Meaning of FAX is -

19 / 34

In frequency modulation the single affects -

20 / 34

The device given intense monochromatic parallel and highly coherent light beam is

21 / 34

Sky wave communication is based upon-

22 / 34

On a particular day the maximum frequency related from the ionosphere is 10 mhz on the other day it was found to decrease to 8 mhz . what is the ratio of the maximum density of ionosphere on the 2 days

23 / 34

WWW is acronym for

24 / 34

The height of a tv transmission Tower at any place on the surface of the Earth is 245 m. the maximum distance up to which transmission of Tower will reach is

25 / 34

The values possible in digital single are

26 / 34

Which range of frequency is used in TV transmission?

27 / 34

Which of the following units is correct to measure attenuation?

28 / 34

In pulse modulation-

29 / 34

Radio wave are reflected by-

30 / 34

GPS is acronym for

31 / 34

What is the meaning of BER

32 / 34

Analogue communication may be related to -

33 / 34

Unit of information is

34 / 34

Digital single comprise of

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