A regular pentagon has four charges each +q at four of its vertices. At the centre of the pentagon, a charge +q is kept. If the distance of a vertex from the center is a the magnitude of the net force acting on the charge at the center is

A regular polygon has "20" sides.Equal charges,each "Q" ,are placed at "19" vertices of the polygon and a charge "q" is placed at the centre of polygon.If the distance of each vertex from the centre is 'a' net force experienced by "q" is -

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

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

A point charge +Q is placed at the centroid of an equilateral triangle. When a second charge +Q is placed at a vertex of the triangle, the magnitude of the electrostatic force on the central charge is 8 N. The magnitude of the net force on the central charge when a third charge +Q is placed at another vertex of the triangle is

A point charge +Q is placed at the centroid of an equilateral triangle. When a second charge +Q is placed at a vertex of the triangle, the magnitude of the electrostatic force on the central charge is 8 N. The magnitude of the net force on the central charge when a third charge +Q is placed at another vertex of the triangle is

Four particles each having a charge q, are placed on the four vertices of a regular pentagon. The distance of each corner from the centre is a. Find the electric field at the centre of the pentagon.

Four particles each having a charge q, are placed on the four vertices of a regular pentagon. The distance of each corner from the centre is a. Find the electric field at the centre of the pentagon.

Four equal charges are kept fixed on the vertices of a square of side 'a'. A charge q_1 is kept at the centre of the square as shown in the figure . Then

A cube of side x has a charge q at each of its vertices. Determine the potential due to this charge array at the center of the cube.