The electric field at the centre of a square having equal charge q at each of the coner (side of square a )

The magnetic field at the centre of square of side a is

The magnetic field at the centre of square of side a is

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

Three charges ,each of + 4 mu C ,are placed at the corners A,B,C of a square ABCD of side 1 m .The electric field at the centre O of a square ABCD of side 1 m .The electric field at the centre O of the square is

Four identical charges i.e. q is placed at the corners of a square of side a . The charge Q that must be placed at the centre of the square such that the whole system of charges in equilibrium is

A charge Q is placed at the centre of a square If electric field intensity due to the charge at the corners of the square is E_(1) and the intensity at the mid point of the sidde of square is E_(2) then the ratio of (E_(1))/(E_(2)) will be

A charge Q is placed at the centre of a square If electric field intensity due to the charge at the corners of the square is E_(1) and the intensity at the mid point of the sidde of square is E_(2) then the ratio of (E_(1))/(E_(2)) will be

Four charges each of -Q , are placed at the four corners of a square. Find out the value of a charge q placed at the centre of the square, such that all the charges would be at equilibrium.