Question

which option is true

Q12. An observer is moving away from a source at rest. The pitch of the
note heard by the observer is less because
(a)The pitch of the source decreases
(b)The velocity of sound in air increases
(d)Wave length of the wave becomes small
(d)Wavelength of the wave remains unchanged but observer receives less
number of waves
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Answer 1

Answer:

B is the answer

Explanation:

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Answer 2

Answer:

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Explanation:

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