Question

I don't understand what formula to use for this question:
Points A and B each have an electric potential of +9 V. How much work is required to take 1 mC of charge from A to B?
Thank you

Answer 1

exactly as much as to slide down one mountain and up the one beside it to the same height, with no friction of course.

Answer 2

ps:
That is what potential is all about.

Answer 3

Thanks, I'll keep checking with others for a formula. Appreciate your time.