Class 12 Physics Chapter 13 Online Test – Nuclei

Which of the relations is correct for radioactive atom?

X rays was discovered by

The source of solar energy is

The usual constituents of a nucleus are

Two nuclei of isobars of an element must have

The nucleus of any atom is made up of

What is the unit of radioactivity?

Which of the following mass number related to Alpha activity ?

Which of the following is not a fundamental particle?

The function of moderator in nuclear reactor is to

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

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

Gamma rays are similar to

The unit of radioactivity is

Beta rays are deflected in

Which one of the following has maximum penetrating power ?

In nuclear reactors, the control rods are made of

The reason for high penetrating power of Gamma rays is

Which particle must be emitted with beta particle from nucleus?

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

The values of N/Z for stable nuclei are :

To isotopes of an element have equal number of-

The constituents of nucleus are

Mass defect per nucleon is called

Two nuclei of isobars of an element must have

The quantities, which remain conserved in a nuclear reaction -

First nuclear reaction has been done by

The number of neutrons in nucleus is -

Which of the following is correct for Alpha particle?

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

The radius of a nucleus is

Beta rays are fast moving

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

X-rays are emitted in

Life of a fossil in estimated by

The specific binding energy of nucleus is ____then binding energy .