Rationalised 2023-24
Physics
48
In other words, the electrostatic potential (V )
at any point in a region with electrostatic field is
the work done in bringing a unit positive
charge (without acceleration) from infinity to
that point The qualifying remarks made earlier regarding
potential energy also apply to the definition of
potential To obtain the work done per unit test
charge, we should take an infinitesimal test charge
dq, obtain the work done dW in bringing it from
infinity to the point and determine the ratio
dW/dq Also, the external force at every point of the
path is to be equal and opposite to the electrostatic
force on the test charge at that point