List of top Physics Questions

When two rigid bodies with moments of inertia \(I_1\) and \(I_2\) and angular velocities \(\omega_1\) and \(\omega_2\) respectively are coupled in such a way that their rotation axes coincide, the angular velocity of the combination is \(\omega\). Then
A garden roller of weight \( 100\,kg \) is pulled with a force of \( 300\,N \) acting at an angle of \( 30^\circ \) with the ground. The effective pulling weight of the roller (in kg wt) is \((g=10\,m/s^2)\)
When a body starts from rest and moves with uniform acceleration, then its instantaneous displacement \( s \) is related to time \( t \) as
A body of mass \(2\) kg is moving with a velocity of \(10\,\text{m s}^{-1}\). If a force of \(50\) N is applied on it for \(10\) s along its motion, the velocity of the body (in \(\text{m s}^{-1}\)) is
The dimensions of ratio of energy to Planck's constant are those of
A particle moving in a circular path, covers equal distances in equal intervals of time. Then the quantity associated with the particle that remains constant with time is
A stone is dropped from a height of 45 m. What is the time taken for the stone to reach the ground?
A ball is dropped from a height of 20 m. What is its velocity just before hitting the ground? (Take \( g = 9.8 \, \text{m/s}^2 \))
If the electric field of a plane electromagnetic wave is $E_z = 60\sin(0.5\times 10^3x + 1.5\times 10^{11}t)$ Vm$^{-1}$, then the magnetic field of the wave is
A p-n junction diode without any voltage biasing acts as:
The possible number of energy states in a Ge crystal containing $5\times10^{3}$ atoms is:
In the hydrogen spectrum, the shortest wavelength of the Brackett series is produced during the transition:
A radioactive element with $6\times10^{5}$ atoms initially is left with $0.75\times10^{5}$ undecayed atoms in $48$ years. The half-life is:
Light energy is redistributed in:
An electromagnetic wave travelling in vacuum has its electric field component, $E=15\sin(1.57y+5.4t)\hat{j}$. The wavelength of the wave is:
An unpolarized light incident on a plane glass surface gets totally polarized on reflection. If the refractive index of glass is $\tan 57^{\circ}$, then the angle of refraction is:
Chromatic aberration arises in thick lenses due to:
Which one of the following pairs of charges separated by the same distance r will experience a maximum force?
A musician hits a drum 90 times in a minute. The time period of hit is
If the speed of the transverse wave in a wire under certain tension T is v, then its speed under tension $2T$ (in $ms^{-1}$) is
If the time period of a particle executing SHM is 8 s, then the time period of the potential energy of this particle is
Bernoulli's principle is applicable to
If the mean free path of a gas molecule at $27^{\circ}\text{C}$ is $10\times10^{-7}\ \text{m}$, its mean free path at $87^{\circ}\text{C}$ is:
Which one is INCORRECT statement?
The principle behind the function of Bunsen burner is