Electrical Technology
BACK EMF Any two terminal of a network force of the magnitude cuts the magnetic flux this force is called back emf.The voltage is inversely proportional to the current & resistence.After that force is proportional to m1 & m2 & inversely proportional to distance of both of diameter difference of the distance of two masses.This charge or force is say gravitional force then it should be same as in electrical competent.So that is q1 and q2 are the charge then electrical force is proportional to the multiplication of two charge and inversely proportional to the internal distance between two charges.