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 plane wave is incident on a boundary between two media. The angle of incidence is 30°. If the refractive index of the first medium is 1.5 and second is 1, what is the angle of refraction?
A tuning fork vibrates at 256 Hz. If the speed of sound is 340 m/s, the distance between consecutive compressions in the sound wave is:
A mechanical wave has the equation y = 5sin(2πx - 10πt), where x and y are in cm and t is in seconds. The wave velocity is:
A sound wave undergoes total internal reflection at an interface. This indicates:
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 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 wave pulse travels along a rope. When it reaches a fixed end, the reflected pulse is:
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 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:
A standing wave on a string has nodes at x = 0 and x = 2 m. The wavelength is:
Two sound waves have frequencies 256 Hz and 260 Hz. If they produce 4 beats per second, the beat frequency matches when:
An observer approaches a stationary sound source of frequency 500 Hz with velocity 20 m/s. If the speed of sound is 340 m/s, what is the observed frequency?
Two coherent sources vibrate in phase and produce waves of wavelength 2 cm. If they are separated by 6 cm, what is the phase difference between the waves at a point equidistant from both sources?
A sound source is moving away from a stationary observer with velocity 30 m/s. The source frequency is 600 Hz and speed of sound is 340 m/s. What is the observed frequency?
A stretched string fixed at both ends has length 1 m and mass 0.01 kg. If tension is 40 N, what is the fundamental frequency?
A plane wave is incident on a barrier with a small opening. The wave diffracts through the opening. Which factor most affects the diffraction pattern?