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	For an atom having atomic number Z and atomic weight A, the number of electron in an atoms	A. A - Z B. A + Z C. Z D. A
2	Referring to the above figure, we can say that of all the elements, the most stable element is	A. Phosphours B. Iron C. uranium D. Lithium
3	Different radioactive material have	A. same half lives B. different half lives C. same mean lives D. same total lives
4	The penetration power ofβ-particle is	A. zero B. less thanα-particle C. equal toα-particle D. greater thanα-particle
5	Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called	A. deuteron B. deterium C. protium D. tritium
6	The unit of decay constant is	A. sex B. sec² C. sec^-1 D. sec^-2
7	The reciprocal of decay constant λ of a radioactive material is:	A. Frequency B. Half life C. Year D. Mean life
8	Neutron was disvovered by:	A. Rutherford in 1920 B. Chadwick in 1922 C. Bohr in 1913 D. Compton in 1927
9	Neutrons are	A. positive charge B. negatively charged C. massless D. neutral
10	U-238 present in the natural uranium is about:	A. 59% B. 0.007% C. 99% D. 39%

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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

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

In 1932 Chadwick discovered

Alfa particles are

The reciprocal of decay constant λ of a radioactive material is:

Structure of the nucleus was explained by

Which of the following material has longer half life

1 amu is equal to.

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

Fraction of the decaying atoms per unit time is called

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

The half lie of radium-226 is

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Rate of decay is actually described by.

A pair of quark and antiquark makes a:

The emission of radiations take place in elements, having charge number greater than

The number of protons inside a nucleus is called

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

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

Charge on proton is

Three quarks make:

The penetration power ofβ-particle is

Radioactivity

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

The nucleus/nuclei of hydrogen is/are:

γ-rays behave like a particle because they explain the

The rate of decay of radioactive substance

Different radioactive material have

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

U-238 present in the natural uranium is about:

Neon gas have three isotopes whose atomic numbers are

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ECAT Physics Chapter 21 Important MCQ's

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