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

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 # 2

Nucleus of a hydrogen atom may contain:

Question # 3

Charge on proton is

Question # 4

Neutron was suggested to be in the nucleus by:

Question # 5

Structure of the nucleus was explained by

Question # 6

The amount of energy equivalent to 1 a.m.u is

Question # 7

Electrons are

Question # 8

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

Question # 9

The half life of uranium-238 is

Question # 10

A mass spectrograph sort out

Question # 11

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

Question # 12

The rate of decay of a radioactive substance

Question # 13

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

Question # 14

The most abundant isotope of neon is

Question # 15

The chemical properties of all the isotopes of an elements are

Question # 16

In 1932 Chadwick discovered

Question # 17

An alpha particle has a charge of

Question # 18

Neutron was discovered by

Question # 19

After alpha decay the atomic number of the atom

Question # 20

Pair production take place when energy ofγ-rays photon is

Question # 21

For Protium, the mass defect is:

Question # 22

A pair of quark and antiquark makes a:

Question # 23

Mass of neutron is

Question # 24

According to Rutherford atomic model, the positive charge in an atom

Question # 25

The half life of radioactive substances depends upon

Question # 26

There is present in paraffin a large amount of:

Question # 27

Marie curie and Pierre curie discovered:

Question # 28

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

Question # 29

The number of all the protons and neutrons in a nucleus is known as

Question # 30

Nucleon means:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
2 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
3 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
4 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
5 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
6 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
7 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
8 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
9 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
10 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks

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