Verify this result for the simple configuration of two charges of the same magnitude and sign placed a certain distance apart.

Write two different vectors having the same magnitude.

A particle of mass M and charge q is at rest at the midpoint between two other fixed similar charges each of magnitude Q placed a distance 2d apart. The system is collinear as shown in the figure. The particle is now displaced by a small amount x(x lt lt d) along the line joining the two charges and is left to itself. It will now oscillate about the mean position with a time period ( epsi_(0) = permittivity of free space)

A charge Q is divided into two equal parts q=(Q)/(2) . If the chages q and q are placed at certain distance,

Calculate the force of repulsion acting between two positive charges of magnitude 20 esu and 30 esu when they are kept at a distance of 2 cm in air.

Can two vectors of different magnitudes be combined to give a zero resultant ?

Two positive charges of magnitude 'q are placed at the ends of a side (side 1) of a square of side '2a'. Two negative charges of the same magnitude are kept at the other corners. Starting from rest, if a charge Q moves from the middle of side 1 to the centre of square, its kinetic energy at the centre of square is