# A charge of #4 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #27 J# to #15 J#, what is the voltage between points A and B?

##### 1 Answer

Jul 5, 2018

#### Explanation:

Using the definition, voltage is the difference of electric potential between two points per unit charge passing through it. We can express it as an equation in the form of:

where:

#B# is the electric potential of the second point

#A# is the electric potential of the first point

#C# is the charge passing through in coulombs

So, we get: