List of top Physics Questions asked in VITEEE, NEET (UG)

The cathode of a photoelectric cell is changed such that the work function changes from $W_1$ to $W_2 (W_2 > W_1).$ If the current before and after changes are $I_1$ and $I_2$, all other conditions remaining unchanged, then (assuming $h \upsilon > W_2$)
A piece of copper and other of germanium are cooled from the room temperature to 80 K, then
The energy equivalent of one atomic mass unit is
The time constant of C-R circuit is
The mass of $\alpha$-particle is
The speed of a homogenous solid sphere after rolling down an inclined plane of vertical height h form rest without sliding is
Faraday's laws are consequence of conservation of
If the number of turns per unit length of a coil of solenoid is doubled, the self-inductance of the solenoid will
A 100 millihenry coil carries a current of 1 A. Energy stored in its magnetic field is
A magnetic field of $2\times 10^{-2}$T acts at right angles to a coil of area 100 $cm^2$, with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in t sec. The value of t is
A body is executing simple harmonic motion. When the displacements from the mean position is $4 \,cm$ and $5 \,cm$, the corresponding velocities of the body is $10 \,cm/sec$ and $8\, cm/sec$. Then the time period of the body is
The velocity of charge carriers of current (about 1 ampere) in a metal under normal conditions is of the order of
A closed organ pipe (closed at one end) is excited to support the third overtone. It is found that air in the pipe has
A heavy uniform chain lies on horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25 s, then the maximum fraction of the length of the chain that can hang over one edge of the table is
A car moves a distance of 200 m. It covers the first half of the distance at speed 40 km/h and the second half of distance at speed v. The average speed is 48 km/h. The value of v is
A uniform magnetic field acts right angles to the direction of motion of electrons. As a result, the electron moves in a circular path of radius 2 cm. If the speed of electrons is doubled, then the radius of the circular path will be
A deuteron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 metre in a plane perpendicular to magnetic field B. The kinetic energy of the proton that describes a circular orbit of radius 0.5 metre in the same plane with the same B is
A particle of mass m = 5 is moving with a uniform speed v = 3$\sqrt 2$ in the XOY plane along the line Y = X + 4. The magnitude of the angular momentum of the particle about the origin is
In the nucleus of $_{11}Na^{23}$ , the number of protons, neutrons and electrons are
Ratio of intensities of two waves are given by 4 : 1. Then ratio of the amplitudes of the two waves is
The angular velocity and the amplitude of a simple pendulum is $\omega$ and a respectively. At a displacement x from the mean position if its kinetic energy is T and potential energy is V, then the ratio of T to V is
The depletion layer in the p-n junction region is caused by
The dimensional formula of permeability of free space $\mu_0$ is
Two trains move towards each other with the same speed. The speed of sound is 340 m/s. If the height of the tone of the whistle of one of them heard on the other changes to 9/8 times, then the speed of each train should be
When milk is churned, cream gets seperated due to