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CBSE - Sound and Wave
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Practice Question
Sound and Wave
.
Sound and Wave
The S.I. unit of pressure is -
(1) N.m
2
(2) N
/
m
2
(3) m
2
/
N
(4) N
/
m
Correct Answer: 2
.
Related Questions
Sound and Wave
1
A person sees a jet plane flying from east to west . When the plane is just above his head, the sound of plane appears to reach him at 60° with horizontal. If the velocity of sound is v, then velocity of jet plane is :
Correct Answer: 4
2
The vibrations are amplified several times in the middle ear to the bones known as
(1) Anvil
(2) Stirrup
(3) Hammer
(4) All of the above
Correct Answer: 4
3
Two beakers P & Q are filled to the brim with a water at 4°C. Beaker P is heated while Q is cooled. What is expected in these beakers now ?
(1) Water will overflow in both beakers
(2) Water level will go down in both beakers
(3) Water will go down in P & over flow in Q
(4) Water will go down in Q & over flow in P
Correct Answer: 1
4
A simple pendulum perform 18 oscillations per second the mechanical wave produced by it will be
Correct Answer: 1
5
The expansion of a solid body depends on -
(1) Mass of the solid only
(2) Nature of the solid only
(3) Temperature of the solid only
(4) Nature and temperature of the solid
Correct Answer: 4
