ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

00:00
Question # 1

Which of the following material has smaller has life

Question # 2

A curie represents a very strong source of

Question # 3

Curie is a unit of

Question # 4

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

Question # 5

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 6

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

Question # 7

The nucleus/nuclei of hydrogen is/are:

Question # 8

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

Question # 9

The half life of uranium-238 is

Question # 10

Pair production take place when energy ofγ-rays photon is

Question # 11

Radiation detector are used to

Question # 12

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

Question # 13

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
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 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
7 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
9 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
10 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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