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

Radioactivity was discovered by

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 4

The rate of decay of a radioactive substance

Question # 5

The half lie of radium-226 is

Question # 6

1 amu is equal to.

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

Phenomenon of radioactivity is due to disintegration of

Question # 9

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 10

After alpha decay the atomic number of the atom

Question # 11

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

Question # 12

For Protium, the mass defect is:

Question # 13

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

Question # 14

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

Question # 15

The number of isotopes of hydrogen are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
2 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
3 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
4 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
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 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
7 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
8 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
9 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
10 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these

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