Question

Moving 4.0 coulombs of charge through a circuit requires 20 joules of electric energy. What is the potential difference across this circuit?

Answer 1

Given

Charge is q=4.0 C

Work done, W=20 J

To find

The potential energy

Explanation

We know potential difference is work done per unit charge

Thus,

$\begin{gathered} V=\frac{W}{q} \\ \Rightarrow V=\frac{20}{4} \\ \Rightarrow V=5\text{ V} \end{gathered}$

Conclusion

The potential difference is 5 V