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

γ-rays are

Question # 2

The nucleus/nuclei of hydrogen is/are:

Question # 3

Electrons are

Question # 4

β-particles are easily deflected by collisions than heavy

Question # 5

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

Question # 6

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

Question # 7

The diameter of an atom is of the order

Question # 8

In radio-active decay, the original element which disintegrate to another element is called

Question # 9

A mass spectrograph sort out

Question # 10

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

Question # 11

Mass of proton is of order of

Question # 12

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 # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

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

Question # 15

The range ofβ-particle in air is greater than that ofα-particle by

Question # 16

Curie is a unit of

Question # 17

Nucleus of a hydrogen atom may contain:

Question # 18

Nucleon means:

Question # 19

Rate of decay is actually described by.

Question # 20

A pair of quark and antiquark makes a:

Question # 21

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 22

Charge on proton is

Question # 23

The unit of decay constant is:

Question # 24

The energy acquired by a mass of 1g moving with the speed of light is

Question # 25

Which of these is not a radiation detector

Question # 26

Phenomenon of radioactivity is due to disintegration of

Question # 27

γ-rays behave like a particle because they explain the

Question # 28

The unit of decay constant is

Question # 29

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

Question # 30

In radioactive decay, the new element which is formed due to the disintegration of original element is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
2 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
3 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
4 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
5 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
6 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
7 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
8 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
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4

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