Four charges are arranged at the corners of a square `ABCD`, as shown in the adjoining figure, The force on a positive charge kept at the centre `O` is

Four charges are arranged at the corners of a square ABCD as shown in the figure. The force on the charge kept at the centre O will be:

Four charges are arranged at the corners of a square ABCD as shown in the figure. The force on the charge kept at the ccentre O is

Four charges are arranged at the corners of a square ABCD, as shown. The force on a positive charge kept at the centre of the square is

Four charges are arranged at the corners of a square ABCD , as shown. The force on a =ve charge kept at the centre of the square is -

Four point charges are placed at the corners of a square ABCD of side 10 cm, as shown in figure. The force on a charge of 1muC placed at the centre of square 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 Q-Q, Q-Q are placed at the corners of a square as shown . The potential is zero at points

Four charges are arranged at the corners of a square ABCD pf side d, as shown in Fig. Find the work required to put together this arrangement (b) A charge q_(0) brought to the center E of the square, the four charges being held fixed at the corners . How much extra work in needed to do this ?

Positive point charges are placed at the vertices of a star shape as shown in the figure. Direction of the electrostatic force on a negative point charge at the centre O of the star is