List of top Physics Questions

A convex lens is dipped in a liquid, whose refractive index is equal to the refractive index of the material of the lens. Then its focal length will
Which of the following is used to reduce chromatic aberration in lenses?
In the phenomenon of photoelectric emission, on increasing the intensity of incident light, the photoelectric current
The wavelength of de Broglie wave associated with any moving particle does not depend on
The formula of kinetic mass of photon is
The speed of electromagnetic wave in any material medium does not depend on.
Which of the following is not an electromagnetic wave?
In polarised light the angle between plane of vibration and plane of polarization is
In parallel combination of condensers, which quantity remains same for each condenser?
On inserting a dielectric material between two positive charges in air, the value of repulsive force will
The speed of an electron accelerated from rest under a potential difference \( V \) is
The distance between two equal and opposite charges of \( 0.2 \mu C \) will be 3.0 cm. Their electric dipole moment will be
Inside a closed surface, n electric dipoles are situated. The electric flux coming out from the closed surface will be
Two light waves of equal amplitude and equal wavelengths are superimposed. The amplitude of the resultant wave will be maximum when phase difference between them is
The specific charge of an electron is
If the critical angle for total internal reflection from any medium to vacuum is 30°, then the velocity of light in the medium is.
Image formed by convex mirror is always
In a step-up transformer, the value of current in secondary coil compared to the primary coil is
In an a.c. circuit containing only capacitor, the phase difference between current and voltage is
In a purely inductive circuit, the power factor is
Unit of \( \frac{{\mu_0}}{{\epsilon_0}} \) is.
The peak value of an alternating current is 10 A. Its root mean square value will be?
When an ammeter is shunted then its measurement limit
Dimensional formula of permeability is.
If the number of turns is increased in any moving coil galvanometer, then its sensitivity