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Chapter 18 Atomic and Nuclear Physics-12
1.
What are gamma radiations?
a) Fast moving light photons
b) Helium nucleus
c) Stream of low-energy electrons
d) Neon nucleus
2.
What is the phenomenon called by which radiations split matter into positive and negative ions?
a) Penetration
b) Combination
c) Ionization
d) Transmutation
3.
What is the phenomenon called by which radiations split matter into positive and negative ions?
a) Penetration
b) Combination
c) Ionizing effect
d) Transmutation
4.
Which type of radiations can ionize the matter?
a) Beta radiations
b) All of these
c) Alpha radiations
d) Gamma radiations
5.
Which type of radiations has the greatest power of ionization as compared to others?
a) None of these
b) Alpha radiations
c) Beta radiations
d) Gamma radiations
6.
What is the reason for greatest power of ionization of alpha radiations?
a) (b) Smaller mass
b) (d) Large positive charge
c) (c) Larger mass
d) (a) Both c and d
7.
Which type of radiations has the least power of ionization as compared to others?
a) Gamma radiations
b) Beta radiations
c) All of these
d) Alpha radiations
8.
Which type of radiations can be stopped by an ordinary sheet of thin aluminium foil?
a) Beta (β) particles
b) Alpha (α) particles
c) Gamma (γ) rays
d) All of these
9.
Which type of radiations may be able to penetrate several millimetres of aluminium?
a) All of these
b) Beta (α) particles
c) Alpha (β) particles
d) Gamma (γ) rays
10.
What are gamma radiations?
a) Electrons
b) Neurons
c) Protons
d) Photons
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