List of top Physics Questions

Define threshold wavelength and frequency.

Calculate the de-Broglie wavelength for electrons moving with speed of \( 10^5 \, \text{m/s} \).

Why can’t two equipotential surfaces intersect each other?

Diffraction of light is the phenomenon of bending of light around the corners of an aperture in its path. (T/F)

Wheatstone bridge is used to measure:

A semiconductor is a device that obeys Ohm's law. (T/F)

The ultimate individual unit of magnetism in any magnet is:

The laws of electromagnetic induction have been used in the construction of:

The strength of a bar magnet is maximum at its center. (T/F)

When the distance between the charges is halved, the force between the charges becomes:

If a dielectric is kept between two plates of a capacitor, its capacitance:

Applying forward bias in a p-n junction, the potential barrier:

In the Bohr model of the hydrogen atom, the lowest orbit corresponds to:

On doping, the conductivity of a semiconductor:

The image of a real object as seen through a convex mirror is:

The conversion of light energy into electrical energy is achieved in a:

Velocity of light is maximum in:

The maximum kinetic energy of the photoelectrons depends only on:

Hugen's wave theory allows us to know about:

What is the peak value of AC 220 Volt?

Which has the longest wavelength?

The ratio of maximum vertical to maximum horizontal distances travelled by a projectile with \( \theta \) as the angle of initial velocity with ground depends on

Area under velocity-time graph gives

If \( m \) is the mass of the projectile thrown upwards with velocity \( u \) at an angle \( \theta \) with the ground, then the change in momentum from the lowest to highest point of its trajectory will be

If \( V_A \) and \( V_B \) are velocities of A and B respectively and their directions are normal to each other, the relative velocity of A with respect to B is