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

Radiation detector are used to

Question # 2

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 # 3

Radioactivity

Question # 4

Neutrons are

Question # 5

Neutron was discovered by

Question # 6

The half life of radioactive substances depends upon

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

The most abundant isotope of neon is

Question # 9

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

Question # 10

The range of particle depends upon the factor

Question # 11

Nucleus of a hydrogen atom may contain:

Question # 12

The reciprocal of decay constant λ of a radioactive material is:

Question # 13

β-particles are easily deflected by collisions than heavy

Question # 14

Radioactivity is

Question # 15

Different radioactive material have

Question # 16

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

Question # 17

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

Question # 18

For Protium, the mass defect is:

Question # 19

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

Question # 20

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 21

Binding energy per nucleus is

Question # 22

The diameter of an atom is of the order

Question # 23

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

Question # 24

A mass spectrograph sort out

Question # 25

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 26

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

Question # 27

The penetration power ofβ-particle is

Question # 28

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 29

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

Question # 30

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

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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 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
3 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
6 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
7 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
8 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
9 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
10 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks

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