ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Which of the following material has longer half life

Question # 2

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

Question # 3

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 4

Fraction of the decaying atoms per unit time is called

Question # 5

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 6

For Protium, the mass defect is:

Question # 7

A mass spectrograph sort out

Question # 8

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

Question # 9

Neon gas have three isotopes whose atomic numbers are

Question # 10

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

Question # 11

Three quarks make:

Question # 12

The nucleus/nuclei of hydrogen is/are:

Question # 13

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

Question # 14

Different radioactive material have

Question # 15

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 16

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

Question # 17

Which are not the elementary particles?

Question # 18

The total charge of any nucleus is given as

Question # 19

Gamma rays consist of steam of

Question # 20

A pair of quark and antiquark makes a:

Question # 21

Alfa particles are

Question # 22

β-particles are easily deflected by collisions than heavy

Question # 23

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

Question # 24

Nuclei that have the same charge number but different mass number are called

Question # 25

In wilson cloud chamber, the air becomes saturated with:

Question # 26

In 1932 Chadwick discovered

Question # 27

Curie is a unit of

Question # 28

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 # 29

When certain nucleus emits anα particle, its mass number:

Question # 30

Proton was discovered by Rutherford in

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Sr.# Question Answer
1 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
2 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
3 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
4 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
5 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
6 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
7 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
8 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
9 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
10 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle

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