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

potential=work/charge
work=potential*charge
=20*2

Answer 2

at infinity potential is zero volt. so change in potential* charge is the work done
So (20-0)*2=40J is the answer:)