Point charges `1muC, 2muC and -3muC` are at rest on the X-axis respectively at points `x_1 = 10cm, x_2 = 20 cm and x_3 = 30 cm`. Calculate the potential due to the charges at the origin.

Two point charges 3muC and -3muC are placed respectively, at points A and B, 2cm apart Mention the location of equipotential surface of the system.

An infinite number of identically charged bodies are kept along the X-axis at points x = 0,1 m, 2 m, 4 m, 8 m, 16 m and so on. All other charges repel the charge at the origin with a force of 1.2 N. Find magnitude of each charge

A regular hexagon of side 10 cm. has a charge of 5muC at each of its corners. Calculate the potential at the centre of hexagon.

Calculate the potential at point P due to a charge 4 xx 10^(-7)C located 9cm away.