Question

A charge of 2 coulomb is moved in an electric field from infinity to two points P and Q if the work done in bringing the charge 2 point P is 14 Joule and in bringing it to the point is 18 joule calculate the potential difference between the point P and Q

Answer 1

v = w/q
v = 14/2
v = 7 volt

for Q
v = 18/2
= 9 volt

p d = 9-7
= 2 volt