List of top Physics Questions asked in Bihar Board Class XII

The value of electric potential at a distance r from a point charge is
64 identical drops each of capacity 5 µF combine to form a big drop. What will be the capacity of the big drop?
If the distance between the two charges is increased, then the electrostatic potential energy of the charges
The relation between the drift velocity (\(V_d\)) and applied electric field (E) of a conductor is
What is mainly measured by potentiometer?
Waves of UHF frequency are generally transmitted as
The symbol \(\rightarrow\!\!|\) is the symbol of
The law, governing the force acting between two electric charges known as
Unit of amplification factor of transistor is
Which one of the following logic gates is universal logic gate?
A convex lens of focal length 40 cm and a concave lens of focal length 20 cm are in contact. The power of their combination in dioptre is
The reason for the phenomenon of interference is
Which is used to produce polarised light?
The value of maximum amplitude produced due to interference of two waves given by \(Y_1 = 4\sin(\omega t)\) and \(Y_2 = 3\cos(\omega t)\) is
A charge 'q' placed at the centre on the line joining two charges 'Q' will be in equilibrium if 'q' will be equal to
What is the angle between the electric dipole moment \(\vec{p}\) and the electric field strength \(\vec{E}\) when the dipole is in a stable equilibrium?
The formula for magnetic energy density for a solenoid is
Which of the following physical quantities is a vector?
The ratio of electric force and gravitational force acting between two charges is in the order of
LASER action needs
Light is a transverse wave because it shows
The half-life of a radioactive isotope (\(^{210}\)Bi) is 5 days. The fraction of the nuclei undecayed at the end of 20 days will be
Which range of frequency is used in TV transmission?
The phase difference between electric wave and magnetic wave in the electromagnetic wave is
The dispersive power of a prism depends on