Question

A charge of `4 C` is passing through points A and B on a circuit. If the charge's electric potential changes from `21 J` to `17 J`, what is the voltage between points A and B?

Answer 1

`v_(AB)=-1 V`

Explanation:

`"work doing by electrical forces between two points is given as: " Delta W=q*(V_B-V_A)`
`V_b-V_A=V_(AB)" we can write"`
`17-21=4*v_(AB)`
`-4=4*v_(AB)`
`v_(AB)=-1 V`