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Physics Past Questions and Answers

Waec Physics Questions

Question 131:

Which of the following is not a suitable method for reducing loss of heat from a piece of hot iron?

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A Wrapping it in cotton wool
B Painting it black
C Placing it in a vacuum
D Placing it on rubber supports
E Keeping it in a closed wooden box

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Question 132:

When the direction of vibration of the particles of a medium is perpendicular to the direction of travel of a wave the wave transmitted is known as

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A Sound wave
B Transverse wave
C Longitudinal wave
D Stationary wave
E Mechanical wave

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Question 133:

A bat emits a sound wave at a speed of 1650.0ms^-1 and receives the echoes 0.15s later. Calculate the distance of the bat from the reflector

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A 8.75m
B 16.50m
C 87.75m
D 123.75m
E 330.00m

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Question 134:

A tuning fork sounds louder when its stem is pressed against a table top than when held in air because

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A A larger mass of air is set vibrating by the table top
B The whole table vibrates in resonance
C The whole table has acquired a larger frequency
D The fork and table have the same frequency
E The amplitude of the vibrating fork is increased.

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Question 135:

Which of the following is/are characteristics of sound? I Pitch II. Loudness III. Quality IV Noise

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A I only
B II only
C I and II only
D L, II and III only
E I, II, III and IV

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