Kerala (English Medium) Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
Which of the following is a device used for doing experiments in sound?

(A) Light	(B) Air
(C) Turning fork	(D) Scale

Question-2
When the pendulum is at rest it is said to be in

(A) Equilibrium position	(B) Maximum displacement
(C) Maximum displacement	(D) Period

Question-3
The number of complete waves generated per second is called

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

Question-4
Sound wave is an example of

(A) Transverse wave	(B) Longitudinal wave
(C) Mechanical wave	(D) Electromagnetic wave

Question-5
What is the relation between velocity ( v ), frequency ( f ) and wavelength ( λ ) of a wave?

(A) f = V λ	(B) V = f λ
(C) λ = Vf	(D) V = ^f/_λ

Question-6
The particles of the medium vibrate perpendicular to the direction of propagation of the wave in

(A) Transverse waves	(B) Longitudinal waves
(C) Mechanical waves	(D) All the above

Question-7
The time taken for one oscillation is called

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

Question-8
The unit of frequency is

(A) Lambda	(B) Hertz
(C) Second	(D) Metre

Question-9
The depressed portion of a wave is called

(A) Crust	(B) Trough
(C) Amplitude	(D) Wavelength

Question-10
The distance between two successive crust or trough is called

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

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Std 9

Kerala (English Medium)

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