IGCSE Cambridge Secondary Grade 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
As compared to α particles, β particles have

(A) Greater penetrating power	(B) Lower penetrating power
(C) Same penetrating power	(D) Cannot predict

Question-2
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-3
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-4
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-5
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-6
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-7
Emission of hot free electron from a metal surface is called

(A) Radioactivity	(B) Thermionic emission
(C) Conductivity	(D) Convection

Question-8
A hydrogen atom minus an electron forms

(A) Neutron	(B) Electron
(C) Proton	(D) Positron

Question-9
Atoms which have the same number of protons but different numbers of neutrons as that of the element are called its

(A) Nuclides	(B) Isobars
(C) Isotopes	(D) Positrons

Question-10
Protons and neutrons together in the nucleus form

(A) Positron	(B) Electron
(C) Nucleons	(D) α particles

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Cambridge Secondary Grade 9

IGCSE

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