Four point charges of `+1muc` each are placed on the four corners of a square of side 1 m. Calculate the electric potential at the centre of the square.

Four equal point harges each 16 mu C are placed on the four corners of a square of side 0.2 m. Calculate the force on any one of the charges.

Four point charges are placed at the corners of a square of side l. Calculate potential at the centre of square.

Eight identical point charges of q coulomb each are placed at the corners of a cube side 0.1m. Calculate electric field at the centre of the cube. Calculate the field at the center when one of the corner charges is removed.

Four point charges +1 muC, +1 muC, -1 muC and -1 muC are placed at the corners A,B,C and D of a square of each side 0.1 m (i) Calculate electric potential at the center O of the square (ii) If E is middle point of BC, what is work done in carrying an electron from O to E ?

Electric charges of +10 muC,+5 muC,-3 muC and +8 muC are placed at the corners of a square of side sqrt(2) m, the potential at the centre of the square is

Four point charges, +0.2muC, +0.2muC, -0.2muC and -0.2muC are placed on vertices A, B, C and D, respectively of square ABCD of side a. Calculate the electric potential at the centre of the square.

Four point masses of 10 kg each are placed at the corners of a square PQRS of side 3 cm. Calculate the moment of inertia of the square about an axis coinciding with the side PQ of the square.

Four masses, each equal to M are placed at the four corners of a square of side a. Calculate the force of attraction on another mass m, kept at the centre of the square.