Which of the following equations describes a circular polarization?

The work done in carrying a charge through an equipotential surface is:

If the distance is doubled, what happens to the electric field intensity?

Three capacitors of 2.0 μF, 3.0 μF, and 6.0 μF are connected in series to a 10 V source. What is the charge on the 3.0 μF capacitor?

The purpose of the retardation test on D.C. shunt machines is to find out

A bar magnet of magnetic moment M is cut into two parts of equal length. The magnetic moment and the pole strength of either part is

The ratio of masses of three wires is 1:2:3 and that of their lengths is 3:2:1. If the wires are made of the same material, the ratio of their resistances will be:

The effect of stray magnetic field on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are

In an AC circuit, the current lags behind the voltage by a phase difference of 90°. Which of the following components is present in the circuit?

An electromagnetic wave in a vacuum has the electric and magnetic fields E and B, which are always perpendicular to each other. The direction of polarization is given by X and the direction of wave propagation by k. Then: