Home/ Questions/Q 411217
Next
In Process
Isha Konda
Asked: 2022-11-11T20:06:14+05:30 In:

A vehicle, with a horn of frequency n is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency `n + n_(1)`. Then (if the sound velocity in air is 300 m/s)
A. `n_(1) = 10 n`
B. `n_(1)=0`
C. `n_(1)=0.1 n`
D. `n_(1)=-0.1 n`

A vehicle, with a horn of frequency n is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency `n + n_(1)`. Then (if the sound velocity in air is 300 m/s)
A. `n_(1) = 10 n`
B. `n_(1)=0`
C. `n_(1)=0.1 n`
D. `n_(1)=-0.1 n`
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. Correct Answer – b

    • 0
Zeeshan Omar Prasad
Asked: 2022-11-09T05:28:18+05:30 In:

A vehicle with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then (if the sound velocity in air is 300 m/s)

(a) n1 = 10 n 

(b) n1 = 0 

(c) n1 = – 0.1 n 

(d) n1 = 0.1 n

A vehicle with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then (if the sound velocity in air is 300 m/s)

(a) n1 = 10 n 

(b) n1 = 0 

(c) n1 = – 0.1 n 

(d) n1 = 0.1 n

Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. (b) n1 = 0

    No doppler effect is observed if the source moves perpendicular  to the line joining the source and the observer. Therefore, the correct choice is (b).

    • 0
Kiran Sarin
Asked: 2022-10-29T03:01:30+05:30 In:

A vehicle , with a horn of frequency `n` is moving with a velocity of `30 m//s` in a direction prependicular to the straight line joining the observer and the vehicle . The observer perceives the sound to have a grequency `(n + n_(1))` . If the sound velocity in air is `330 m//s` , then
A. `n_1=10n`
B. `n_1=-n`
C. `n_1=0.1n`
D. `n_1=0`

A vehicle , with a horn of frequency `n` is moving with a velocity of `30 m//s` in a direction prependicular to the straight line joining the observer and the vehicle . The observer perceives the sound to have a grequency `(n + n_(1))` . If the sound velocity in air is `330 m//s` , then
A. `n_1=10n`
B. `n_1=-n`
C. `n_1=0.1n`
D. `n_1=0`
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. Correct Answer – D
    No doppler effect, because velocity is perpendicular to line joining vehicle and observer.

    • 0