List of top Physics Questions

If escape velocity one earth surface is 11.1 km/hr then find the escape velocity on the moon surface if mass of moon is \(\frac{1}{81}\) times of the mass of the earth and radius is \(\frac{1}{4}\) times radius of earth

The current in the $1\Omega$ resistor shown in the circuit is

In a common base mode of a transistor, the collector current is $5.488\, mA$ for an emitter current of $5.60\, mA$. The value of the base current amplification factor $(\beta)$ will be

The equivalent capacitance of the combination of the capacitors is

If the kinetic energy of a free electron doubles, it�s de-Broglie wavelength changes by the factor

The half-life period and the mean life period of a radioactive element are denoted respectively by $T_h$ and $T_m$. Then

In amplitude modulation, the amplitude of carrier wave is $A_c$ and that of the modulating signal is $A_m$. In practice, the ratio of to $A_m$ to $A_c$ is kept less than or equal to one, to avoid

A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which one of the following will not be affected ?

A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced current in wires $AB$ and $CD$ are

The work done by an uniform magnetic field, on a moving charge is

Consider a pair of insulating blocks with thermal resistances $R_1$ and $R_2$ as shown in the figure. The temperature $\theta$ at the boundary between the two blocks is

In Young's double slit experiment, the central point on the screen is

Two thin lenses are in contact and the focal length of the combination is $80\, cm$. If the focal length of one lens is $20 \,cm$, then the power of the other lens will be

The Young?? modulus of a perfectly rigid body is

A person swims in a river aiming to reach exactly on the opposite point on the bank of a river. His speed of swimming is $0.5\, m/s$ at an angle of $120^?$ with the direction of flow of water. The speed of water is

A mass of $0.5\, kg$ moving with a speed of $1.5\, m/ s$ on a horizontal smooth surface, collides with a nearly weightless spring of force constant $k = 50\, N/m$. The maximum compression of the spring would be

If the differential equation for a simple harmonic motion is $\frac{d^{2}y}{dt^{2}}+2y=0,$ the time-period of the motion is

An electric dipole is kept in a uniform electric field. It experiences

A hollow sphere and a solid sphere, of equal mass and equal radii roll down without slipping on an inclined plane. If the torque experienced by the hollow sphere and solid sphere are $\tau_H$ and $\tau_S$ respectively, then

A rain drop of radius $0.3\, mm$ has a terminal velocity in air is $1\, m/s$. The viscosity of air is $8 \times 10^{-5}$ poise. The viscous force on it is

The magnetic field at a distance r from a long wire carrying current i is 0.4 tesla. The magnetic field at a distance 2r is

If resistivity of copper is \(1.72×10^{-8}  \Omega-m\) and number of free electron in copper is \(8.5×10^{28} / m^3\). Find mobility

Find resonance frequency in the given circuit:

Find amount of charge flown from Y to X when switch S is closed.