JEE Physics - MCQ Practice Questions

A sound source moves towards a stationary observer with velocity v_s. The observer hears frequency f'. The actual frequency of the source is f. The relationship is:

A string of length 1 m is fixed at both ends. The fundamental frequency is 100 Hz. What is the frequency of the third harmonic?

A wave on a string has amplitude A = 5 cm and period T = 0.2 s. The maximum velocity of a particle on the string is:

Two identical loudspeakers separated by 2 m emit sound of frequency 340 Hz in phase. If the speed of sound is 340 m/s, constructive interference occurs at:

A pipe closed at one end has its fundamental frequency at 200 Hz. The next higher harmonic that can be produced is:

A longitudinal wave has frequency 50 Hz and wavelength 8 m. The wave velocity is:

A wave pulse travels along a rope. When it reaches a fixed end, the reflected pulse is:

Standing waves are formed on a string by superposition of two waves traveling in opposite directions with:

A progressive wave is represented as y = 2sin(100πt - πx/2). The phase difference between particles at x = 1 m and x = 3 m is:

The intensity of a wave is proportional to:

A person hears sound from two sources with frequencies 400 Hz and 404 Hz. The beat frequency heard is:

A wave undergoes refraction when passing from one medium to another. Which quantity remains constant?

A string vibrates with 4 antinodes forming a standing wave pattern. The number of nodes (excluding ends) is:

The Doppler effect is observed when:

A standing wave on a string has nodes at x = 0 and x = 2 m. The wavelength is:

A tuning fork of frequency 512 Hz is vibrating above a resonance tube filled with water. As water level is lowered, resonance first occurs at length 16 cm. The speed of sound is:

Two sound waves have frequencies 256 Hz and 260 Hz. If they produce 4 beats per second, the beat frequency matches when:

A wave pulse on a rope travels from a denser to a lighter medium (from thin to thick rope). The reflected pulse:

A wave is traveling through a medium with velocity v = 340 m/s. If the wavelength is 0.85 m, what is the frequency of the wave?

Which of the following correctly represents the relationship between wave velocity, frequency, and wavelength?