Waves And Sound Test

Result

Waves And Sound Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Bells are made of metal and not of wood, because

A
thermal conductivity of metal is greater than that of wood

B
density of the metal is greater than that of wood

C
sound is not conducted by metals, but is radiated

D
wood dampens vibration while metals are elastic

Solution

Bells are made of metal and not of wood because metals are elastic and wood dampens vibrations. On the contrary, metals do not dampen the vibrations.
Question 2
1 / -0

Ultrasonic, infrasonic and audible waves travel through a medium with speeds v_u, v_i and v_a,respectively. Which of the following relations holds true?

A
v_i = v_a = v_u

B
v_u > v_a > v_i

C
v_u < v_a < v_i

D
v^a ≤ v^u ≤ vⁱ

Solution

All the three waves will travel with the same speed. The difference lies in their wavelengths and frequencies.
Question 3
1 / -0

The speed of sound is maximum in

A
water

B
steel

C
vacuum

D
air

Solution

Speed of sound is maximum in steel.