Wave motion, transverse and longitudinal waves, superposition, Doppler effect.
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Q1 · Waves · EASY
For a travelling wave y = A sin(ωt − kx), the wave speed is:
Q2 · Waves · EASY
Two tuning forks of frequencies 256 Hz and 260 Hz are sounded together. The number of beats per second heard is:
Q3 · Waves · EASY
A string fixed at both ends vibrates in its fundamental mode with a frequency of 200 Hz. The length of the string is 0.8 m. What is the speed of the wave in the string?
Q4 · Waves · MEDIUM
A sound source is moving towards a stationary observer with speed 30 m/s. The frequency emitted by the source is 500 Hz. If the speed of sound in air is 330 m/s, what is the apparent frequency heard by the observer?
Q5 · Waves · HARD
Two coherent waves of equal amplitude A and constant phase difference of π/3 superpose at a point. What is the resultant amplitude at that point?