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Physics 10 Chapter 11 - Sound - 18
1.
The speed of sound in solids is how many times than in gases?
a) Ten times
b) Fifteen times
c) Sixteen times
d) Five times
2.
By change in which of the following, speed of sound in air is affected?
a) Temperature
b) All of these
c) Humidity
d) Pressure
3.
If P = 1 atm and T = 21oC, then what will be the speed of sound?
a) 331 ms
-1
b) 351 ms
-1
c) 343 ms
-1
d) 321 ms
-1
4.
What is the speed of sound in air at one atmosphere of pressure and room temperature?
a) 351 ms
-1
b) 331 ms
-1
c) 321 ms
-1
d) 343 ms
-1
5.
The speed varies with............?
a) Pressure
b) All of these
c) Humidity
d) Temperature
6.
What is the speed of sound in air at one atmosphere of pressure?
a) 343 ms
-1
b) 331 ms
-1
c) 321 ms
-1
d) 351 ms
-1
7.
A doctor count 72 heartbeats in 1 min. Calculate the frequency of the heartbeats?
a) 11.25 Hz
b) 72 Hz
c) 1.2 Hz
d) 0.83 Hz
8.
What is the formula to find the speed of sound?
a) Formula: v = f - λ
b) Formula: v = f / λ
c) Formula: v = f + λ
d) Formula: v = f λ
9.
What is ‘v’ in the relation “v = f λ”?
a) Frequency of sound wave
b) Amplitude of sound wave
c) Wavelength of sound wave
d) Speed of sound wave
10.
What is the room temperature?
a) 31oC
b) 21oC
c) 35oC
d) 25oC
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