Sound Test

Result

Sound Test - 11

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Weekly Quiz Competition

Question 1
1 / -0

Use the following information to answer the next question.

Lucas drops a pebble in a water filled tub. A wave is created on the surface of water. Lucas observes that 5 peaks of water wave reach the boundary of the tub per second.

It can be concluded from Lucas’ observations that the

A
wavelength of the wave is 5 units

B
frequency of the wave is 5 units

C
amplitude of the wave is 5 units

D
speedof the wave is 5 units

Solution

Frequency of a wave is defined as the number of peaks passing through a point per second. Since a total of five peaks reach the boundary of the tub per second, the frequency of the created wave is five units.

The correct answer is B.

Why alternative A is wrong:

The distance between two consecutive peaks is known as the wavelength of a wave. The wavelength of the wave cannot be determined as the distance is not mentioned.

Why alternative C is wrong:

The maximum height of crests or trough from the mean position is known as the amplitude of a wave. The maximum height of a peak from the mean position is not mentioned. Therefore, amplitude of the wave cannot be determined.

Why alternative D is wrong:

Speed of a wave is the distance traveled by the wave in unit time.