A tuning fork frequency 512 Hz is vibrated with a sonometer wire and 6 beats per second are heard. The beat frequency reduces if the tension in the string is slightly increased. The original frequency […]
A source of sound and a detector are moving along the same line with same speed
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(a) Frequency registered by the detector is same as frequency of source (b) Frequency registered by […]
The second overtone of an open pipe is in resonance with the first overtone of a closed pipe of length 2 m. Length of the open pipe is
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(a) 4 m (b) 2 […]
The loudness and pitch of a sound note depends on
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(a) Intensity and frequency (b) Frequency and number of harmonics (c) Intensity and velocity (d) Frequency and velocity
Correct Answer:
Intensity and frequency
A tuning fork A produces 4 beats per second with another tuning fork B of frequency 320 Hz. On filing one of the prongs of A, 4 beats per second are again heard when sounded […]
If in an experiment for determination of velocity of sound by resonance tube method using a tuning fork of 512 Hz, first resonance was observed at 30.7 cm and second was obtained at 63.2 cm. […]
If v is the speed of sound in air, then the shortest length of the closed pipe which resonates to a frequency n
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(a) v / 4n (b) v / 2n (c) 2n […]
A tuning fork vibrates with 2 beats in 0.04 second. The frequency of the fork is
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(a) 50 Hz (b) 100 Hz (c) 80 Hz (d) None of these
Correct Answer:
50 Hz
A source and an observer approach each other with same velocity 50 m/s. If the frequency is 435 s⁻¹, then the real frequency is (Velocity of sound=332 m/s)
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(a) 320 s⁻¹ (b) 360 […]
A source is moving towards an observer with a speed of 20 m/s and having frequency of 240 Hz. The observer is now going towards the source with a speed of 20 m/s. Apparent frequency […]
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