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A police car moving at 22(m)/(s) chases ...


A police car moving at `22(m)/(s)` chases a motorcyclist. The police man sounds his horn of frequency 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of motorcyclist if it is given that he does not hear any beat (speed of sound in air is `330(m)/(s)`)

A

`33(m)/(s)`

B

`22(m)/(s)`

C

`11(m)/(s)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
`n_1=n_2implies(v-v_m)/(v-v_C)n'=(v+v_m)/(v)n`
`implies(v-v_m)/(v-22)xx176=(v+v_m)/(v)xx165`
`impliesn_m=22(m)/(s)`
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CENGAGE PHYSICS ENGLISH-SOUND WAVES AND DOPPLER EFFECT-Single Correct
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  2. For a sound wave travelling towards +x direction, sinusoidal longitudi...

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  3. If the source is moving towards right, wavefront of sound waves get mo...

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  4. Consider a source of sound S and an observer P. The sound source is of...

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  5. When source and detector are stationary but the wind is blowing at spe...

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  6. Figure. Represents the displacement y versus distance x along the dire...

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  7. The driver of a car approaching a vertical wall notices that the frequ...

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  8. The difference between the apparent frequency of a source of sound as ...

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  9. The freqency of a radar is 780 M hz. The frequency of the reflected wa...

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  10. A train moves towards a stationary observer with speed 34 m//s. The tr...

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  11. A siren placed at a railway platfrom is emitted sound of frequency 5 k...

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  12. A person speaking normally produces a sound of intensity 40 dB at a di...

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  13. A police car moving at 22(m)/(s) chases a motorcyclist. The police man...

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  14. In sport meet the timing of a 200 m straight dash is recorded at the f...

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  15. When a source moves away from a stationary observer, the frequency is ...

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  16. Length of a string of density rho and Young's modulus Y under tension ...

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  17. Source and observer start moving simulatneously along x and y-axis res...

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  18. A statinary observer receives a sound of frequency 2000 Hz. The variat...

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  19. A source of sound of frequency f1 is placed on the ground. A detector ...

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  20. A sound wave of frequency f travels horizontally to the right . It is ...

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