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

The rate of decay of a radioactive substance

Question # 2

Marie curie and Pierre curie discovered:

Question # 3

Three quarks make:

Question # 4

Neutron was discovered in

Question # 5

The range of particle depends upon the factor

Question # 6

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

Question # 7

The half life of uranium-238 is

Question # 8

The nucleus left after the emission of some radiation is called:

Question # 9

U-238 present in the natural uranium is about:

Question # 10

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

Question # 11

Different radioactive material have

Question # 12

The number of protons inside a nucleus is called

Question # 13

Gamma rays consist of steam of

Question # 14

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 # 15

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

Question # 16

Nucleus of a hydrogen atom may contain:

Question # 17

The number of isotopes of hydrogen are

Question # 18

Mass of proton is of order of

Question # 19

Structure of the nucleus was explained by

Question # 20

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Curie is a unit of

Question # 25

Electrons are

Question # 26

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

Question # 27

In 1932 Chadwick discovered

Question # 28

Mass of neutron is

Question # 29

The figure 1.007276μ shows the mass of an:

Question # 30

A pair of quark and antiquark makes a:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
2 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
3 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
4 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
5 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
6 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
7 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
10 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these

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