19 JEE Main 2021 Waves and Sound previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Waves and Sound chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Waves and Sound chapter hub.
Two cars are approaching each other at an equal speed of 7 . 2   km   hr - 1 . When they see each other, both…
A 25   m long antenna is mounted on an antenna tower. The height of the antenna tower is 75   m . The wavelen…
A student is performing the experiment of the resonance column. The diameter of the column tube is 6   cm . The fr…
With what speed should a galaxy move outward with respect to earth so that the sodium- D line at wavelength 5890  …
The frequency of a car horn encountered a change from 400   Hz to 500   Hz . When the car approaches a vertic…
A galaxy is moving away from the earth at a speed of 286   km   s - 1 . The shift in the wavelength of a red…
Two cars X and Y are approaching each other with velocities 36   km   h - 1 and 72   km   h - 1 res…
A sound wave of frequency 245   Hz travels with the speed of 300   m   s - 1 along the positive x-axis.…
Two waves are simultaneously passing through a string and their equations are : y 1 = A 1 sin k ( x - v t ) , y 2 = A 2…
The percentage increase in the speed of transverse waves produced in a stretched string if the tension is increased by…
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