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

Neutron was discovered by

Question # 3

Which of these is not a radiation detector

Question # 4

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

Question # 5

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 6

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

Question # 7

When certain nucleus emits anα particle, its mass number:

Question # 8

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

Question # 9

Alfa particles are

Question # 10

A mass spectrograph sort out

Question # 11

Nucleon means:

Question # 12

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

Question # 13

In 1932 Chadwick discovered

Question # 14

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 15

For Protium, the mass defect is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
2 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
3 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
4 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
5 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
6 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
7 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
10 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

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