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

00:00
Question # 1

Neutron was discovered in

Question # 2

The most abundant isotope of neon is

Question # 3

Rutherford performed an experiment on nuclear reactions in:

Question # 4

The unit of decay constant is:

Question # 5

A mass spectrograph sort out

Question # 6

Which of the following material has smaller has life

Question # 7

Electrons are

Question # 8

Mass of neutron is

Question # 9

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

Question # 10

Neutrons are

Question # 11

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

A pair of quark and antiquark makes a:

Question # 16

The half life of uranium-238 is

Question # 17

Nucleus consists of

Question # 18

Nucleon means:

Question # 19

For Protium, the mass defect is:

Question # 20

γ-rays behave like a particle because they explain the

Question # 21

Gamma rays consist of steam of

Question # 22

Pair production take place when energy ofγ-rays photon is

Question # 23

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 # 24

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

Question # 25

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

Question # 26

The unit of decay constant is

Question # 27

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

Question # 28

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 29

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

Question # 30

In 1932 Chadwick discovered

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
2 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
3 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
4 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
5 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
6 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
7 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
8 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
9 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
10 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron

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