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

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

Question # 2

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

Question # 3

Nucleus consists of

Question # 4

The unit of decay constant is:

Question # 5

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 6

Neutrons are

Question # 7

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

Question # 8

Rate of decay is actually described by.

Question # 9

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

Question # 10

Proton was discovered by Rutherford in

Question # 11

The most abundant isotope of neon is

Question # 12

Nucleon means:

Question # 13

Gamma rays consist of steam of

Question # 14

Radiation detector are used to

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
2 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
3 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
4 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
5 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
6 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
7 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
8 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
9 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
10 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these

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