# A charge of 8 C is passing through points A and B on a circuit. If the charge's electric potential changes from 36 J to 6 J, what is the voltage between points A and B?

Feb 25, 2018

Voltage difference = the change in potential energy/charge

So, we can say as potential energy of charge at $A$ is higher than that at $B$ , $A$ is at higher voltage than $B$,

So,the Voltage difference between them is $\frac{36 - 6}{8} = 3.75 V$

Feb 25, 2018

The change in energy is $30 J$ and the charge is $8 C$
Using the formula $E = Q V$, since voltage is simply the energy gained/lost per coulomb of charge,
$V = \frac{30}{8} = 3.75 V$