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Question-1
Emission of hot free electron from a metal surface is called
(A)
Radioactivity
(B)
Thermionic emission
(C)
Conductivity
(D)
Convection
Question-2
The harmful radioactive effects in the absence of any actual radioactive materials are called
(A)
Isotopes
(B)
Carbon dating
(C)
Back ground radiations
(D)
Ozone layer
Question-3
As compared to α particles, β particles have
(A)
Greater penetrating power
(B)
Lower penetrating power
(C)
Same penetrating power
(D)
Cannot predict
Question-4
Radioisotope is used on the treatment of
(A)
Cancer
(B)
AIDS
(C)
Respiratory problems
(D)
All the above
Question-5
Which radiations are not deflected in electric and magnetic fields?
(A)
α Particles
(B)
β Particles
(C)
γ Particles
(D)
All the above
Question-6
All radioactive substances should be put in
(A)
Metal containers
(B)
Lead containers
(C)
Carbon containers
(D)
Clay containers
Question-7
Which radiations cause maximum ionization?
(A)
α radiations
(B)
β radiations
(C)
γ radiations
(D)
Infrared radiations
Question-8
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
Question-9
The workers handling which substances should wear special form badger?
(A)
α radiations
(B)
β Radiations
(C)
γ Radiations
(D)
All the above
Question-10
Which radiations have the most penetrating power?
(A)
α radiations
(B)
β Radiations
(C)
γ Radiations
(D)
U – V radiations
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Cambridge Secondary Grade 10
IGCSE
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