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Question-1
Which of the following is used to flow electric current in vacuum?
(A)
Radioactivity
(B)
Conductivity
(C)
Thermionic emission
(D)
Convection
Question-2
As compared to α particles, β particles have
(A)
Greater penetrating power
(B)
Lower penetrating power
(C)
Same penetrating power
(D)
Cannot predict
Question-3
Which radiations cause maximum ionization?
(A)
α radiations
(B)
β radiations
(C)
γ radiations
(D)
Infrared radiations
Question-4
Emission of hot free electron from a metal surface is called
(A)
Radioactivity
(B)
Thermionic emission
(C)
Conductivity
(D)
Convection
Question-5
Which type of harmful radiations are emitted by nuclear wastes?
(A)
α radiations
(B)
β radiations
(C)
γ radiations
(D)
Beta and gamma radiations
Question-6
Protons and neutrons together in the nucleus form
(A)
Positron
(B)
Electron
(C)
Nucleons
(D)
α particles
Question-7
Controlled exposure of which radiations are used on the treatment of cancer?
(A)
α radiations
(B)
β Radiations
(C)
γ Radiations
(D)
U – V radiations
Question-8
A hydrogen atom minus an electrons forms
(A)
Neutron
(B)
Electron
(C)
Proton
(D)
Positron
Question-9
Which of the following is a method to find the age of an animal or plant fossil?
(A)
Isotopes
(B)
Isobars
(C)
Carbon dating
(D)
Radioactivity
Question-10
Which part of a hot cathode ray tube give a fire beam of electrons to it?
(A)
Electron gun
(B)
Deflecting system
(C)
Fluorescent screen
(D)
All the above
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Cambridge Secondary Grade 10
IGCSE
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