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

Examples of moderators used in a fission reactor is/are:

Question # 2

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

Question # 3

Rate of decay is actually described by.

Question # 4

Which of these is not a radiation detector

Question # 5

An alpha particle has a charge of

Question # 6

The number if neutrons in the nucleus of 92U235are

Question # 7

Neutron was discovered in

Question # 8

Radioactivity was discovered by

Question # 9

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

Question # 10

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 11

Different radioactive material have

Question # 12

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

Question # 13

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

Question # 14

γ-rays behave like a particle because they explain the

Question # 15

Neutron was suggested to be in the nucleus by:

Question # 16

Which are not the elementary particles?

Question # 17

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

Question # 18

A particle having the mass of electron and charge of a proton is called a

Question # 19

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

Question # 20

Rutherford performed an experiment on nuclear reactions in:

Question # 21

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

Question # 22

β-particles are easily deflected by collisions than heavy

Question # 23

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

Question # 24

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

Question # 25

When certain nucleus emits anα particle, its mass number:

Question # 26

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

Question # 27

U-238 present in the natural uranium is about:

Question # 28

In wilson cloud chamber, the air becomes saturated with:

Question # 29

Nucleus consists of

Question # 30

There is present in paraffin a large amount of:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
2 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
3 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
6 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
7 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
8 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
9 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
10 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron

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