A change q is moved from a point A above a dipole of dipole moment p to a point B below the dipole in equatorial plane without acceleration. Find the work done in this process.

The angle between the dipole moment and electric field at any point on the equatorial plane is

What is electrostatic potential due to electric dipole at an equatorial point?

A spherical shell of radius b with charge Q is expanded to a radius a. Find the work done by the electrical forces in the process.

The magnetic induction at a point P on the axis is equal to the magnetic induction at a point Q on the equator of a short magnetic dipole. What is the ratio of the distances of P and Q from the centre of the dipole?

The electric potential at a point along the axis of an electric dipole depends on distance r from the dipole as

Assertion : the net work done by an electrostatic field on a charge whilr moving it from one point to another is independent of path. Reason: the net work done by an electrostatic force on a charge in it moving along a closed loop is zero.

Derive an expression for the electric intensity due to an electric dipole at a point on the axis of dipole. When a point charge of 5 xx 10^-9 C is taken from point A to point B, the work done is 10^-6 J. Find the potential difference between points A and points B.

The magnetic induction at an axial point is equal to the magnetic induction at an equatorial point. Calculate the ratio of their distances from the centre of the dipole.

(a) Assuming the earth to be a sphere of uniform density, calculate the value of acceleration due to gravity at a point, 1600 km above the earth, (b) Also find the rate of variation of acceleration due to gravity above the earth's surface. Radius of earth =6400 km, g =9.8 m//s^(2) .

The figure shows the elliptical orbit of a planet about the sun S. An ellipse is the curve obtained when a cone is cut by an inclined plane. It has two focal points. The sum of the distances to the two focal points from every point on the curve is constant. F_1 " and " F_2 are the two focal points of the ellipse . The shaded area CF_1D is twice the shaded area AF_1B. t_1 is the time taken by the planet to move from C to D and t_2 is the time to move from A to B Which laws do we understand from the above diagram and description?