Question

A charge of `12 C` is passing through points A and B on a circuit. If the charge's electric potential changes from `54 J` to `42 J`, what is the voltage between points A and B?

Answer 1

`V_(AB)=-1 V`

Explanation:

`Delta W=q(V_B-V_A)`
`"work is done by electrical forces, if charge goes from the Point A to the point B"`
`42-54=12*V_(AB)`
`-12=12 *V_(AB)`
`V_(AB)=-1 V`