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

Question-1
When the pendulum is at rest it is said to be in

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

Question-2
A mechanical wave requires which of the following to travel?

(A) A medium	(B) Light
(C) Sound	(D) All the above

Question-3
Which of the following is a device used for doing experiments in sound?

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

Question-4
The two and fro motion of the pendulum about a fixed point is called

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

Question-5
The depressed portion of a wave is called

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

Question-6
Longitudinal waves and transverse waves together called

(A) Sound waves	(B) Electromagnetic waves
(C) Light waves	(D) Mechanical waves

Question-7
Sound wave is an example of

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

Question-8
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-9
The number of complete waves generated per second is called

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

Question-10
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

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Std 9

Kerala (English Medium)

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