3 Work done in bringing a unit
positive test charge from infinity to the
point P, against the repulsive force of
charge Q (Q > 0), is the potential at P due to
the charge Q Rationalised 2023-24
Electrostatic Potential
and Capacitance
49
 EXAMPLE 2 1
Equation (2 8) is true for any
sign of the charge Q, though we
considered Q > 0 in its derivation