ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

Different radioactive material have

Question # 3

U-238 present in the natural uranium is about:

Question # 4

Electrons are

Question # 5

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

Question # 6

Radioactivity was discovered by:

Question # 7

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

Question # 8

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

Question # 9

Nucleon means:

Question # 10

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

Question # 11

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 12

The rate of decay of a radioactive substance

Question # 13

After alpha decay the atomic number of the atom

Question # 14

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 15

Mass of proton is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
2 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
3 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
4 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
5 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
6 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
7 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
8 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
9 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
10 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these

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