# A charge of #5# #C# is passing through points A and B on a circuit. If the charge's electric potential changes from #28# #J# to #15# #J#, what is the voltage between points A and B?

##### 1 Answer

Apr 12, 2018

#### Answer:

Point A is at a voltage

#### Explanation:

One volt is defined as one joule per coulomb, which we can write as

In this case we're interested in the potential difference, so

That is, point A is at a voltage