ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Different radioactive material have

Question # 2

γ-rays are

Question # 3

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 4

The rate of decay of a radioactive substance

Question # 5

Neutron was discovered in

Question # 6

The rate of decay of radioactive substance

Question # 7

An alpha particle has a charge of

Question # 8

For Protium, the mass defect is:

Question # 9

The time required for a radioactive material to decrease in active by one half is called

Question # 10

How many isotopes of helium are present?

Question # 11

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 12

The nucleus/nuclei of hydrogen is/are:

Question # 13

When a nucleus emits an alpha particles, its charge number decreases by

Question # 14

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

Question # 15

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
4 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
5 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
6 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
7 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
8 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
9 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
10 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window

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