List of top Physics Questions

The resistance of a wire is \( R \) ohm. If it is melted and stretched to \( n \) times its original length, its new resistance will be
An unpolarised beam of intensity \( I_0 \) is incident on a pair of nicols making an angle of \( 60^\circ \) with each other. The intensity of light emerging from the pair is
If frequencies are \( (v - 1) \) and \( (v + 2) \), then find the value of beats.
Which of the following waves are used in the treatment of muscle ache?
The displacement of a wave is given by \( y = 20 \cos(\omega t + 4x) \). The amplitude of the wave is
The function \( y = \log(\omega t) \) can represent
What is the minimum band-gap of the LED diode?
What is the electric field near an infinite plane sheet of charge density \( \sigma \)?
Find the logic gate, when both the inputs are high the output is low and vice-versa.
Work done in moving a charge of 25 C is 50 J. Calculate the potential difference between two points.
Two particles of masses \( m_1 = m \), \( m_2 = 2m \) and charges \( q_1 = q \), \( q_2 = 2q \) entered into uniform magnetic field. Find \( \frac{F_1}{F_2} \) (force ratio).
The correct arrangement in increasing order of wavelength of X-rays, UV rays, and microwaves is
For an ideal gas, coefficient of volume expansion is given by
The velocity of the proton is one-fourth the velocity of the electron. What is the ratio of the de-Broglie wavelength of an electron to that of a proton?
Which of the following quantity represents the dimensions of momentum?
The formula of capacitative reactance is
Two converging lenses of focal length 20 cm and 40 cm are placed in contact. The effective power of the combination is
For the same resonant frequency, if \( L \) is changed from \( L \) to \( \frac{L}{3} \), then capacitance should change from \( C \) to
The angle of projection with the horizontal in terms of maximum height attained and horizontal range is given by
The displacement \( x \) of a particle varies with time \( t \), \( x = ae^{-pt} + be^{qt} \), where \( a, b, p, q \) are positive constants. The velocity of the particle will
In an adiabatic process with the ratio of two specific heat, \( \gamma = \frac{3}{2} \), pressure is increased by \( \frac{2}{3} \% \), then decrease in the volume will be
Insulators can be charged by which of the following process?
Focal length of a lens is 25 cm. Its power is___
Least distance of distinct vision is_____
The alloy made of Cu, Mn, Ni is