NEET Physics Waves Beats MCQs

Two tuning forks A and B produce beats of frequency 5 Hz. Fork A has a known frequency of 440 Hz. When a small piece of wax is attached to fork B, the beat frequency decreases to 2 Hz. What was the original frequency of fork B?

Two organ pipes, open at both ends, have lengths of 0.5 m and 0.505 m. If the speed of sound in air is 340 m/s, what is the beat frequency they produce?

A tuning fork of frequency 512 Hz makes 4 beats per second with another tuning fork. When a small piece of wax is attached to the second fork, the number of beats increases to 6 beats per second. The original frequency of the second fork is:

A sound wave of frequency 500 Hz is emitted by a stationary source. An observer moving towards the source with a constant speed hears a beat frequency of 5 Hz due to the Doppler effect and reflection of the sound from a wall behind the observer. If the speed of sound is 330 m/s, the speed of the observer is approximately:

Two sources S1 and S2, separated by a small distance, emit sound waves of frequencies 400 Hz and 402 Hz respectively. An observer moving along the line joining the sources hears beats. If the speed of sound is 340 m/s, what is the maximum speed of the observer for which beats are still heard?

Two tuning forks A and B produce 6 beats per second when sounded together. If the frequency of A is 512 Hz, what could be the frequency of B?

When two sound waves of slightly different frequencies are superimposed, what is the resulting phenomenon called?

The beat frequency heard when two tuning forks of frequencies 256 Hz and 254 Hz are sounded together is:

If two sounds produce 4 beats per second, what is the difference in their frequencies?

Beats are produced by the superposition of two waves of: