Two point charges of magnitude +q and -q are placed at `(-d/2, 0, 0)` and `(d/2, 0, 0)` respectively. Find the equation of the equipotential surface where the potential is zero.

What is the shape of equipotential surface for a given point charge q.

Two charges -q and +q are located point (0, 0, -a) and (0, 0, a) respectively: Obtain the dependece of potential on the distance r of the point from the origin when r/2 gtgt 1 .

Two charges -q and +q are located point (0, 0, -a) and (0, 0, a) respectively: What is the electrostatic potential at the points (0,0,z) and (x,y,0) ?

Two charges -q and +q are located at points (0, 0, -a) and (0, 0, a), respectively. What is the electrostatic potential at the points (0, 0, z) and (x, y, 0) ?

Two charges of magntiudes - 2Q and + Q are located at points (a,0) and (4a,0) respectively. What is the electric flux due to these charges through a sphere of radius 3 a with the centre at the origin?

Two poit charges of charge values Q and q are placed at a distance of x and x/2 respectively from a third charge of charge value 4q, all charges being in the same striahgt line. Calculate the magnitude and nature of charge Q, such that the net force experienced by the charge q is zero.

A dipole, with its charges, -q an +q, are located at the ponit (0,-b,0) and (0,+b,0), is present in uniform electric field E. the equipotential surfaces of this field are planes parallel to the YZ-planes. What is the direction of the electric field E?

A dipole, with its charges, -q an +q, are located at the ponit (0,-b,0) and (0,+b,0), is present in uniform electric field E. the equipotential surfaces of this field are planes parallel to the YZ-planes. How much torque would the dipole experience in this field?

In the fig. triangle PQO with coordinates of P and O as (3,0) and (0,0) respectively, PQ=5. Find the coordinates of Q.

Point charges + 4q, -q and +4 q are kept on the X-axis at points x = 0, x = a and x = 2 a respectively