Question

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?

Answer 1

`3` volts

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:

`V=(B-A)/C`

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:

`V=(27 \ "J"-15 \ "J")/(4 \ "C")`

`=(12 \ "J")/(4 \ "C")`

`=3 \ "V"`