Physics
Waves
Previous Years Questions

## Numerical

On a frictionless horizontal plane, a bob of mass $m=0.1 \mathrm{~kg}$ is attached to a spring with natural length $l_{0}=0.1 \mathrm{~m}$. The spring...
A stationary tuning fork is in resonance with an air column in a pipe. If the tuning fork is moved with a speed of 2 ms−1 in front of the open end of ...
A train S1, moving with a uniform velocity of 108 km/h, approaches another train S2 standing on a platform. An observer O moves with a uniform velocit...
Two men are walking along a horizontal straight line in the same direction. The man in front walks at a speed $$1.0\,m{s^{ - 1}}$$ and the man behind ...
A stationary source emits sound of frequency $${f_0} = 492\,Hz.$$ The sound is reflected by a large car approaching the source with a speed of $$2\,m{... Four harmonic waves of equal frequencies and equal intensities I0 have phase angles 0,$${\pi \over 3},{{2\pi } \over 3}$$and$$\pi$$. When they are... A stationary source is emitting sound at a fixed frequency f0, which is reflected by two cars approaching the source. The difference between the frequ... When two progressive waves$${y_1} = 4\sin (2x - 6t)$$and$${y_2} = 3\sin \left( {2x - 6t - {\pi \over 2}} \right)$$are superimposed, the amplitude... ## MCQ (More than One Correct Answer) A source, approaching with speed u towards the open end of a stationary pipe of length L, is emitting a sound of frequency fs. The farther end of the ... In an experiment to measure the speed of sound by a resonating air column, a tuning fork of frequency$$500Hz$$is used. The length of the air co... A block$$M$$hangs vertically at the bottom end of a uniform rope of constant mass per unit length. The top end of the rope is attached to fixed rigi... Two loudspeakers M and N are located 20m apart and emit sound at frequencies 118 Hz and 121 Hz, respectively. A car in initially at a point P, 1800 m ... One end of a taut string of length 3 m along the x-axis is fixed at x = 0. The speed of the waves in the string is 100 ms$$-$$1. The other end of the ... Two vehicles, each moving with speed u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity w. On... A horizontal stretched string, fixed at two ends, is vibrating in its fifth harmonic according to the equation y(x, t) = (0.01 m) sin[(62.8 m$$-$$1)x]... ## MCQ (Single Correct Answer) A musical instrument is made using four different metal strings, 1, 2, 3 and 4 with mass per unit length$$\mu $$, 2$$\mu $$, 3$$\mu $$and 4$$\mu $$... A musical instrument is made using four different metal strings, 1, 2, 3 and 4 with mass per unit length$$\mu $$, 2$$\mu $$, 3$$\mu $$and 4$$\mu  ...
A student is performing the experiment of resonance Column. The diameter of the column tube is 4 cm. The frequency of the tuning fork is 512 Hz. The a...
A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The spee...
Column I shows four systems, each of the same length L, for producing standing waves. The lowest possible natural frequency of a system is called its ...
A hollow pipe of length 0.8 m is closed at one end. At its open end a 0.5 m long uniform string is vibrating in its second harmonic and it resonates w...
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