ECAT Pre General Science Chapter 21 online mcq test with answers for Physics chapter 21 (Nuclear Physics)

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ECAT Physics Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called	A. nuclear fission B. nuclear fusion C. man defect D. radioactivity
2	Marie curie and Pierre curie discovered:	A. Uranium B. Polonium C. Radium D. Both (A) and (C)
3	The total charge of any nucleus is given as	A. Ze² B. Z²e C. Z/e D. Ze
4	The rate of decay of a radioactive substance	A. decrease exponentially with time B. decreases linearly with time C. increases linearly with time D. increases exponentially with time
5	Examples of moderators used in a fission reactor is/are:	A. Water B. Heavy water C. Carbon D. Hydrocarbon
6	The isotope/s of hydrogen is /are:	A. Protium B. Deuterium C. Tritium D. Both (A) and (B)
7	Which are not the elementary particles?	A. Photons B. Leptons C. Hadrons D. Quarks
8	Nuclei that have the same charge number but different mass number are called	A. isotones B. isomers C. isotopes D. isobars
9	Charge on neutron is	A. 1.6 x 10^-19C B. zero C. -1.6 x 10^-19C D. 1.2 x 10^-19C
10	Pair production take place when energy ofγ-rays photon is	A. equal to 1.02 Mev- B. greater than 1.02 Mev C. less than 1.02 Mev D. none of these

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ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Heavy water is made of one oxygen atom and two atoms of:

Which of the following material has longer half life

γ-rays are

Nucleon means:

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

How much time, theα-particle more massive than an electron

Mass of proton is of order of

The unit of decay constant is:

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Binding energy per nucleus is

A mass difference of 0.0012 u is equivalent to and energy of:

The rate of decay of a radioactive substance

The rate of decay of radioactive substance

Rutherford performed an experiment on nuclear reactions in:

Neon gas have three isotopes whose atomic numbers are

The number if neutrons in the nucleus of 92U235are

Examples of moderators used in a fission reactor is/are:

The counter, which also provides the power to the G.M. tube is called:

Neutron was disvovered by:

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Charge on neutron is

The half life of uranium-238 is

The number of all the protons and neutrons in a nucleus is known as

Nuclei that have the same charge number but different mass number are called

The most abundant isotope of neon is

The energy is found from Einstein's mass energy relation is called

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Fraction of the decaying atoms per unit time is called

Marie curie and Pierre curie discovered:

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

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ECAT Physics Chapter 21 Important MCQ's

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The number if neutrons in the nucleus of ₉₂U²³⁵are