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

Question-1
All types of electromagnetic reaction travel through vacuum at

(A) 3 × 10⁸ m/s	(B) 3 × 10⁸ km/s
(C) 3 × 10^-8 m/s	(D) 3 × 10^-8 km/s

Question-2
The behaviour of water waves can be studied in

(A) Deep water	(B) Shallow water
(C) Ripple tank	(D) Sea water

Question-3
The pitch of a note depends on

(A) The frequency of the sound	(B) The wavelength of the sound
(C) Speed of a sound	(D) All the above

Question-4
The number of complete waves generated per second is called

(A) Wavelength	(B) Frequency
(C) Displacement	(D) Amplitude

Question-5
Sound waves with frequencies above 20 kH_z are called

(A) Infrasonic waves	(B) ultrasonic waves
(C) Radio waves	(D) Microwaves

Question-6
A bigger crest is formed at the point where two smaller crests from two different sources meet simultaneously is called

(A) Waves in phase	(B) Waves out of phase
(C) Interference	(D) Polarisation

Question-7
Waves travel more slowly in

(A) Ocean	(B) River water
(C) Shallow water	(D) Deep water

Question-8
The distance between two successive crest or trough is called

(A) Displacement	(B) Wavelength
(C) Frequency	(D) Amplitude

Question-9
The phenomenon in which electrons are ejected from metal surfaces when electromagnetic waves fall on them is called

(A) Photoelectric effect	(B) Magnetism
(C) Spectrum	(D) Interference

Question-10
Light of one colour and so of one wavelength is called

(A) Infrared radiation	(B) Ultraviolet radiation
(C) Monochromatic light	(D) X-rays

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Cambridge Secondary Grade 9

IGCSE

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