Question

A point charge of +1.0 µC is moved in the direction of an electric field, and it has a change in electric potential difference energy of 10.0 J. What was the change in electric potential difference? 1 µC = 10^-6 C
1.0 × 108 V

1.0 × 107 V

+1.0 × 107 V

+1.0 × 108 V,

Answer 1

The answer of  the change in electric potential difference is -1.0 × 10^7 V.  It is defined as  the work done per unit charge. A potential difference of 1 V means that 1 joule of work is done per coulomb of charge or  1 V = 1 J C-1.