Two point charges and are fixed apart in air on a straight line
PHYSICS · Multi-part · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields
Problem
Two point charges +3μC and +12μC are fixed 40cm apart in air on a straight line. A point P lies on the line joining the charges where the electric field is zero.
(a) Taking the position of the +3μC charge as the origin and the line joining the charges as the x–axis, set up the algebraic equation needed to find the coordinate of P.
(b) Solve the equation obtained in part (a) and calculate the distance of P from the +3μC charge.
(c) Determine the electric potential at P, taking the potential at infinity to be zero.