ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

Pair production take place when energy ofγ-rays photon is

Question # 3

Which of the following material has longer half life

Question # 4

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

Question # 5

Examples of moderators used in a fission reactor is/are:

Question # 6

The unit of decay constant is

Question # 7

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

Question # 8

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 9

A curie represents a very strong source of

Question # 10

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

Question # 11

Charge on proton is

Question # 12

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

Question # 13

The rate of decay of radioactive substance

Question # 14

The figure 1.007276μ shows the mass of an:

Question # 15

γ-rays behave like a particle because they explain the

Question # 16

An alpha particle has a charge of

Question # 17

Neon gas have three isotopes whose atomic numbers are

Question # 18

When certain nucleus emits aβ-particles, is mass number:

Question # 19

Neutron was discovered by

Question # 20

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

Question # 21

1 amu is equal to

Question # 22

The number of isotopes of hydrogen are

Question # 23

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 24

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

Question # 25

Radiation detector are used to

Question # 26

The half life of uranium-238 is

Question # 27

For Protium, the mass defect is:

Question # 28

The most abundant isotope of neon is

Question # 29

A pair of quark and antiquark makes a:

Question # 30

Three quarks make:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
2 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
3 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
4 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
5 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
6 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
7 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
8 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
9 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
10 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons

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