List of top Physics Questions

A block of certain mass is placed on a rough inclined plane. The angle between the plane and the horizontal is $30^0$. The coefficients of static and kinetic frictions between the block and the inclined plane are 0.6 and 0.5 respectively. Then the magnitude of the acceleration of the block is [Take g=10 ms-2]

One mole of an ideal monoatomic gas is taken round the cyclic process MNOM. The work done by the gas is

Water flows through a horizontal pipe of varying cross-section at a rate of $0.314 m^3s^{-1}$. The velocity of water at a point where the radius of the pipe is 10 cm is

A thick metal wire of density A thick metal wire of density ρ and length ‘L’ is hung from a rigid support. The increase in length of the wire due to its own weight is (Y=Young’s modulus of the material of the wire)and length ‘L’ is hung from a rigid support. The increase in length of the wire due to its own weight is (Y=Young’s modulus of the material of the wire)

What is the value of acceleration due to gravity at a height equal to half the radius of the Earth, from its surface ?

A body of mass 1 kg is suspended by a weightless string which passes over a frictionless pulley of mass 2 kg as shown in the figure. The mass is released from a height of 1.6m from the ground. With what velocity does it strike the ground ?

Depletion region in an unbiased semiconductor diode is a region consisting of

The upper level of valence band and lower level of conduction band overlap in the case of

The photoelectric work function for photo metal is 2.4eV . Among the four wavelengths, the wavelength of light for which photoemission does not take place is

The ratio of area of first excited state to ground state of orbit of hydrogen atom is

In Young's double slit experiment, an electron beam is used to produce interference fringes of width β1 . Now the electron beam is replaced by a beam of protons with the same experimental set-up and same speed. The fringe width obtained is β2 . The correct relation between β1 and β2 is

Which of the following combinations should be selected for better tuning of an LCR circuit used for communication?

The final image formed by an astronomical telescope is

In an LCR series circuit, the value of only capacitance C is varied. The resulting variation of resonance frequency f₀ as a function of C can be represented as

A square loop of side length 'a ' is moving away from an infinitely long current carrying conductor at a constant speed ' v ' as shown. Let ' x ' be the instantaneous distance between the long conductor and side AB . The mutual inductance (M) of the square loop - long conductor pair changes with time (t) according to which of the following graphs?

An induced current of 2 A flows through a coil. The resistance of the coil is 10Ω . What is the change in magnetic flux associated with the coil in 1 ms ?

Magnetic susceptibility of Mg at 300 K is 5 1.2x10^-5 . What is its susceptibility at 200 K ?

Magnetic hysterisis is exhibited by __ magnetic materials.

A particle of specific charge \(\frac{q}{m}=\pi Ckg^{-1}\) is projected the origin towards positive x-axis with the velocity 10ms^-1 in a uniform magnetic field \(\overrightarrow{B}=-2\hat{k}T\). The velocity \(\overrightarrow{v}\) of particle after time \(t=\frac{1}{12}s\) will be ( in ms^-1 )

A moving electron produces

\(\overrightarrow{E}\) is the electric field inside a conductor whose material has conductivity σ and resistivity ρ . The current density inside the conductor is \(\overrightarrow{j}\) . The correct form of Ohm's law is

Each side of a regular hexagon has resistance R. The effective resistance between the two opposite vertices of the hexagon is:

The electrostatic attracting force on a small sphere of charge $0.2\,\mu C$ due to another small sphere of charge $-0.4\,\mu C$ in air is $0.4\,N$. The distance between the two spheres is

A body of mass $M$ is dropped from a height $h$ on a sand floor. If the body penetrates $x\, cm$ into the sand, the average resistance offered by the sand to the body is