WAEC Physics Past Questions & Answers - Page 315

1,571.

A sounding tuning fork is brought near the end of a pipe containing an air column and the loudness of the sound increases. This effect is due to

diffraction

an echo

resonance

interference

reverberation

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

1,572.

A boy standing a distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms1, how far is he from the cliff?

17m

34m

85m

170m

680m

View answer & explanation

Correct answer is C

X = vt/2 = (340 x 0.5)/2 = 85m

1,573.

Which of the following statement s is/are not correct about a standing wave?

I. It is formed by the superimposition of two progressive waves traveling in the same direction II. All points on the wave are vibrating with maximum displacement
III. It is formed by the superimposition of two progressive waves of different amplitudes traveling in opposite directions

I only

II only

I and II only

II and III only

I,II and III

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

1,574.

A source of sound produces waves in air of wavelength 1.65m. If the speed of sound in air is 330ms^-1, the period of vibration in seconds is

200

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