Which of the following is/are necessary for the production of interference with two wave trains?
I. The sources must be close to each other.
II The waves must have the same frequency.
III. The waves must have the same amplitude.
IV. The waves must travel with the speed of light.
I, II and IV only
I, II and III only
I and II only
II, III and IV only
l, III and IV only
Correct answer is B
Constructive and destructive interference result from the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency.
Which of the following is/are characteristics of sound?
I. Pitch
II. Loudness
III. Quality
IV. Noise
I only
II only
I and II only
l, II and III only
I, II, III and IV
Correct answer is D
No explanation has been provided for this answer.
a larger mass of air is set vibrating by the table top
the whole table vibrates in resonance
the whole table has acquired a larger frequency
the fork and table have the same frequency
the amplitude of the vibrating fork is increased.
Correct answer is C
No explanation has been provided for this answer.
8.75m
16.50m
87.75m
123.75m
330.00m
Correct answer is D
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Aptitude Tests