Question

how much work is done when one coulomb of charge moves against a potential difference of 1 volt

Answer 1

Potential difference=work done/charge
Volt=Joules/Columb
1=J/1
1*1=J
1=J

Answer 2

The work done is one joule when "one coulomb of charge" moves against a one volt of potential difference.

Given:

Potential difference = 1 volt

Charge = 1 coulomb

Solution:

The formula for work done for the movement of charge against potential difference is:

Work done = Potential difference × Charge

A action should be done to complete certain work which is called as work done.

Plug the values in the given formula,

Work done =  1 volt × 1 coulomb  

Work done = 1 V.C = 1 joule