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

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

Question # 2

How much time, theα-particle more massive than an electron

Question # 3

Neutron was discovered by

Question # 4

Proton was discovered by Rutherford in

Question # 5

The number of isotopes of hydrogen are

Question # 6

The total charge of any nucleus is given as

Question # 7

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

Question # 8

1 amu is equal to

Question # 9

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 10

Curie is a unit of

Question # 11

A pair of quark and antiquark makes a:

Question # 12

The half life of radioactive substances depends upon

Question # 13

Mass of proton is

Question # 14

In 1932 Chadwick discovered

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
2 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
3 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
4 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
5 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
6 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
7 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
8 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
9 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
10 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes

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