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Question-1
Controlled exposure of which radiations is used on the treatment of cancer?
(A)
α radiations
(B)
β Radiations
(C)
γ Radiations
(D)
U – V radiations
Question-2
Which radiations cause maximum ionization?
(A)
α radiations
(B)
β radiations
(C)
γ radiations
(D)
Infrared radiations
Question-3
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-4
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-5
Which of the following radiations are same as helium nuclei?
(A)
Alpha radiations
(B)
Beta radiations
(C)
Gamma radiations
(D)
Ultraviolet radiations.
Question-6
Which radiations are not deflected in electric and magnetic fields?
(A)
α Particles
(B)
β Particles
(C)
γ Particles
(D)
All the above
Question-7
Subatomic particles with the same mass as that of electrons but with opposite ( positive) charge are called
(A)
Isobars
(B)
Nuclides
(C)
Positrons
(D)
Isotopes
Question-8
Which part of a hot cathode ray tube converts electric signal to visual pattern?
(A)
Electron gem
(B)
Deflecting system
(C)
Fluorescent screen
(D)
All the above
Question-9
Which of the following is used to flow electric current in vacuum?
(A)
Radioactivity
(B)
Conductivity
(C)
Thermionic emission
(D)
Convection
Question-10
Emission of hot free electron from a metal surface is called
(A)
Radioactivity
(B)
Thermionic emission
(C)
Conductivity
(D)
Convection
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Cambridge Secondary Grade 9
IGCSE
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