Class 12 Physics Chapter 6 Online Test – Electromagnetic Induction

Lenz's law is associated with

Direction of Eddy current is obtained from -

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

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

The phenomena called electromagnetic induction was first investigated by

Magnetic flux per unit area is

The SI unit of magnetic flux is

The working of dynamo is based on the principle of

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

An induction coil gives

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

To convert mechanical energy into electrical energy are can use

The principle of mutual induction is used in

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

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

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

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

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

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

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

Inductance is the

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

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

The law related with electromagnetic induction is called

The law of electromagnetic induction was discovered by

SI unit of mutual induction is -

Lenz's law is derived from

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

Which physical quantity has SI unit Henry ?

Magnetic flux is the

An inductor may store energy in its

Instrument which converts mechanical energy into electrical energy is -

The role of self induction is equivalent to

SI unit of magnetic flux is

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