3 charges are placed in a circle of radius `d` as shown in figure. Find the electric field along x-axis at centre of circle.

Three charges are placed on the circumference of a circle of radius d as shown in the figure. Find the electric field along x-axis at the centre of the circle : Electric field due to -4q vecE_(1) =(4kq)/d^(2) electric field due to +2q and -2q vecE_(23) = (4kq)/d^(2)

Three semi-infinite rods uniformly charged out of which one is negatively charged and other two are positively charged are kept perpendicular to plane of paper outward such that the finite ends of the rods are located at points A, B and C on a circle of radius R as shown in figure. The net electric field at centre of circle O is :

Three semi-infinite rods uniformly charged out of which one is negatively charged and other two are positively charged are kept perpendicular to plane of paper outward such that the finite ends of the rods are located at points A, B and C on a circle of radius R as shown in figure. The net electric field at centre of circle O is :

Six point charges are placed at the vertices of a hexagon of side 1 m as shown in figure. Net electric field at the centre of the hexagon is

Four charges are arranged at the corners of a square as shown in the figure. The direction of electric field at the centre of the square is along

Four charges are arranged at the corners of a square as shown in the figure. The direction of electric field at the centre of the square is along

Three point electric charges q_1 = 6µC, q_2 = 4µC and q_3 = -8µC are placed on the circumference of a circle of radius 1m as shown in the figure. What is the value of the charge q, placed on the circle if the potential at the centre of the circle is zero?