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An object producing a pitch of 400 Hz fl...

An object producing a pitch of 400 Hz flies past a stationary person. The object was moving in a straight line with a velocity of 220 m/s. The velocity of sound in air is 330 m/s. Then the frequency of sound heard by stationary person when the object is approaching him is equal to

A

240 Hz

B

96 Hz

C

1200 Hz

D

960 Hz

Text Solution

Verified by Experts

The correct Answer is:
C
`n' = n [(v - v_(0))/(v)]`
`= 400 [(300 - 220)/(330)] = 400 [(110)/(330)]`
`= 1200 Hz`
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