JEE Physics - MCQ Practice Questions
Physics is where JEE ranks are usually won or lost, since a single conceptual slip changes the whole answer. Questions here span mechanics, rotational motion, thermodynamics, waves and oscillations, electrostatics, current electricity, magnetism, optics, and modern physics. Numerical problems carry full derivations so you can see which step you skipped, not just which option was right.
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A wave travels on a string with velocity v = 20 m/s. If the frequency is 50 Hz, what is the wavelength?
Two waves of frequencies 256 Hz and 260 Hz are produced simultaneously. What is the beat frequency?
The equation of a wave is y = 5sin(2πt/0.04 - 2πx/0.8) m. What is the wave velocity?
For a stationary wave on a string fixed at both ends of length L = 1 m, the fundamental frequency is 100 Hz. What is the velocity of the transverse wave on the string?
A tuning fork vibrates at 440 Hz. If the speed of sound is 330 m/s, what is the wavelength of sound produced?
The intensity of a sound wave at distance r from a point source varies as:
A source of frequency 500 Hz moves towards a stationary observer at 10 m/s. The speed of sound is 330 m/s. What is the apparent frequency heard by the observer?
A string of length 2 m vibrates in its third harmonic. The number of nodes (excluding ends) is:
A pipe open at both ends resonates at a frequency of 500 Hz for the fundamental mode. If it is closed at one end, the fundamental frequency becomes:
Two identical sound sources emit waves in phase. An observer is at a point where the path difference is 1.5λ. What is the phase difference?
A standing wave is formed on a string. At a node, the particle velocity is always:
A stationary observer hears a frequency of 1100 Hz from a moving source. If the source is moving towards the observer with speed 10 m/s, and the actual frequency is 1000 Hz, what is the speed of sound?
Energy of a harmonic wave is proportional to:
When a wave passes from a less dense to a more dense medium, the phenomenon that does NOT occur is:
A transverse wave on a string has amplitude A = 0.1 m and frequency f = 50 Hz. Maximum particle velocity is:
Two coherent sources with intensity ratio 4:1 interfere. The maximum intensity in the interference pattern is:
A sound wave traveling in air at 340 m/s encounters a wall. The reflected wave interferes with the incident wave. At what distance from the wall is the first antinode?
A wave travels along a string with velocity v = 20 m/s. If the frequency is 50 Hz, what is the wavelength?
The speed of light in a medium is 2×10⁸ m/s. What is the refractive index of the medium?
Two waves of the same frequency interfere constructively. The amplitude of the first wave is 3 units and the second is 4 units. What is the maximum resultant amplitude?