# A charge of #4# #C# is passing through points A and B on a circuit. If the charge's electric potential changes from #45# #J# to #18# #J#, what is the voltage between points A and B?

##### 1 Answer

Apr 26, 2016

#### Answer:

We have

So

The voltage difference between the points is

#### Explanation:

The negative sign shows that A is at a lower voltage than B, which makes sense because the electric potential energy is lower at B than at A.