List of top Physics Questions asked in Bihar Board Class XII

What is interference of light? Find an expression for fringe width in Young's double slit experiment.
Write the properties of diamagnetic, paramagnetic, and ferromagnetic materials.
What is an electric dipole? Find an expression for electric potential at any point due to an electric dipole.
Mention the difference between p-type and n-type semiconductors.
What is a light-emitting diode (LED)? Write down one application of it.
10$^{19}$ electrons are placed on an uncharged body. Calculate the charge produced on the body.
Write down two uses of a shunt.
What is wattless current?
Explain the difference between nuclear fission and nuclear fusion.
Convert the binary number \(1101\) into the decimal system.
Explain UNIVAC and Fax.
What is the critical angle? Write down its necessary conditions.
What is an eddy current? Write down its utilities.
Find the increase in energy of a condenser of capacity \(6\, \text{pF}\) on changing the potential difference from 10 V to 20 V.
What are ohmic and non-ohmic resistances? Write down one example of each.
What is a cyclotron? State its two limitations.
What is an electromagnetic wave? On which factors does its velocity in vacuum depend?
Write down the energy losses in a transformer.
Define two magnetic elements of the Earth.
Explain the polarization of light.
In a full wave rectifier, if input frequency is 50 Hz, then output frequency will be:
Distance of communication satellite from the surface of the Earth is:
Define intensity of electric field at any point. Write down its S.I. unit.
An electric dipole of dipole moment \(2 \times 10^{-6}\) cm is kept inside a closed surface. What will be the net electric flux coming out from the surface?
Attenuation is measured in: