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

Question-1
The number of complete waves generated per second is called

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

Question-2
Light of one colour and so of one wavelength is called

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

Question-3
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-4
Which rays are used to kill cancer cells and also harmful bacteria in food and surgical instruments?

(A) X-rays	(B) UV - radiation
(C) Ultraviolet radiation	(D) Gama rays

Question-5
Waves travel more slowly in

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

Question-6
Sound waves with frequencies above 20 kH_z are called

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

Question-7
The distance between two successive crest or trough is called

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

Question-8
Which waves can be used for cooking?

(A) Infrared waves	(B) Microwaves
(C) Radio waves	(D) Light waves

Question-9
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-10
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

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Cambridge Secondary Grade 9

IGCSE

Practice in Related Chapters
Light and Sight
Waves and Sounds
Matter and Measurements
Force and Resources
Motion and Energy
Heat and Energy
Electricity
Electromagnetic Effects
Electrons and Atoms