[" 5.Four positive charges,each of magnitude "4times10^(-6)C" ar "],[" you mat warge should be placed at the centre of "]

Two negative point charges each of magnitude 8xx10^(-8)C and another positive charge Q are placed on the same straight line. At what position and for what value of Q, the system will remain in equilibrium?

Four equal point charges, each of magnitude +Q , are to be placed in equilibrium at the corners of a square. What should be the magnitude and sign of the point charge that should be placed at the center of the square to do this job?

Four equal point charges, each of magnitude +Q , are to be placed in equilibrium at the corners of a square. What should be the magnitude and sign of the point charge that should be placed at the center of the square to do this job?

Four positive charges (2sqrt2-1)Q are arranged at the four corners of a square. Another charge q is placed at the centre of the square. Resulting force acting on each corner charge is zero if q is

Two positive charges of magnitude 4 C and 6 C are placed 10 cm apart . The electric potential at a distance of 10 cm from the middle point on the right bisector of the line,joining the two charges is

Four identical charges each .q. are placed at four corners of a square of side .a.. Find the charge to be placed at the centre of the square so that the system of charges is in equilibrium