Question

The potential at a point is 20 V. The work done in bringing a charge of 2 C from infinity to this point will be

a
10 J

b
40 J

c
5 J

d
20 J

Answer 1

The answer should be 40 J, since the work done by us to bring a unit positive charge from infinity to the point is 20 J, by definition of potential, so we multiply it by the charge, i.e. 2C.