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Chapter 18 Atomic and Nuclear Physics-13
1.
Which type of radiations can penetrate at least 30 cm of lead?
a) Gamma (γ) rays
b) Beta (α) particles
c) All of these
d) Alpha (β) particles
2.
Which type of radiations can penetrate at least 2 km of air?
a) Beta (α) particles
b) Gamma (γ) rays
c) All of these
d) Alpha (β) particles
3.
What is the strength of radiations to penetrate a certain material called?
a) Penetrating ability
b) Combination
c) Transmutation
d) Ionization
4.
Which type of radiations has the least penetrating ability as compared to others?
a) None of these
b) Beta radiations
c) Alpha radiations
d) Gamma radiations
5.
Which type of radiations has the greatest penetrating ability as compared to others?
a) Alpha radiations
b) Gamma radiations
c) All of these
d) Beta radiations
6.
What is the reason for greatest penetrating ability of gamma radiations?
a) (a) Both c and d
b) (c) Neutral nature
c) (d) Large positive charge
d) (b) Large speed
7.
Which among the following radiations has more penetrating power?
a) A beta particle
b) An alpha particle
c) All have the same penetrating ability
d) A gamma ray
8.
What is the range of alpha particles?
a) Few centimetres in air
b) Several hundred metres in air
c) Infinity
d) Several metres in air
9.
What is the range of beta particles?
a) Few centimetres in air
b) Infinity
c) Several hundred metres in air
d) Several metres in air
10.
What is the strength of radiations to penetrate a certain material called?
a) Ionization
b) Penetration
c) Transmutation
d) Combination
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