Four point charges, each of `+q`, are rigidly fixed at the four corners of a square planar soap film of side 'a'. The surface tension of the soap film is `gamma`. The system of charges and planar film are in equilibrium, and `a=k[(q^2)/(gamma)]^(1//N)`, where 'K' is a constant. Then N is

When liquid medicine rho is to be put in the eye, it is done with the help of a dropper. As the bulb on the top of the dropper is pressed, a drop froms at the opening of the dropper. We wish to estimate the size of the drop. We first assume that the drop formed at the opening is osperical becaus ethat requires a minimum increase in its surface energy. To datermine the size., we calculate the net vertical force due to the surface tension T when the radius of the drop is R . When this force become smaller than the wight of the drop, the drop gets detached from the droppr. Four point charges, each of +q , are rigidly fixed at the four corners of a squre planer soap film of side 'a' the surface tenson of the soap film is gamma . The susteam of charges and planer film are in equilibrium, and a = k[(q^(2))/(gamma)]^(1//N) , where 'k' is a constant. Then N is

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 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 charges equal to -Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is

Four point charges Q.q Q and q are placed at the corners of a square side 'a' as shown in the figures. Find the Potential energy of this system.

Four small point charges (each of equal magnitude q) are placed at four corners of a regular tetrahedron of side a. find out potential energy of charge system

Four identical point charges q are placed at four corners of a square of side a. Find the potential energy of the charge system. .

Four charges equal to -Q are placed at the four corners fo a square and a charge q is at its centre, If the system is in equilibrium the value of q si