Class 12 Physics Chapter 13 Online Test – Nuclei

Which of the following is correct for Alpha particle?

The usual constituents of a nucleus are

Gamma rays are similar to

X rays was discovered by

The constituents of nucleus are

The radius of a nucleus is

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

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

The nucleus of any atom is made up of

The reason for high penetrating power of Gamma rays is

Mass defect per nucleon is called

Which one of the following has maximum penetrating power ?

Two nuclei of isobars of an element must have

The function of moderator in nuclear reactor is to

The number of neutrons in nucleus is -

Which particle must be emitted with beta particle from nucleus?

The quantities, which remain conserved in a nuclear reaction -

The values of N/Z for stable nuclei are :

Beta rays are fast moving

The unit of radioactivity is

In nuclear reactors, the control rods are made of

Beta rays are deflected in

What is the unit of radioactivity?

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

Life of a fossil in estimated by

The specific binding energy of nucleus is ____then binding energy .

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

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

First nuclear reaction has been done by

Which of the following mass number related to Alpha activity ?

X-rays are emitted in

To isotopes of an element have equal number of-

The source of solar energy is

Which of the following is not a fundamental particle?

Which of the relations is correct for radioactive atom?

Two nuclei of isobars of an element must have