Question

How much energy is required to move 3.2 × 10–19 coulomb of charge through a potential difference of 5 volts?

Answer 1

10 eV

Explanation:

Given:

Carga = 3.2 X 10^-19 C

Voltage = 5 V

Since energy is stored work, we can use the following formula:

`\begin{gathered} V=(W)/(q) \\ \\ W=V\cdot q \\ \\ \text{ We replacing } \\ \\ W=5\cdot3.2\cdot\:10^(-19) \\ \\ W=1.6\cdot\:10^(-18)\text{ Joules} \\ \\ 1\text{ eV = 1.6}\cdot\:10^(-19)\text{ Joules} \\ \\ \text{ Therefore:} \\ \\ W=10\text{ eV} \end{gathered}`

The energy required is 10 electronvolts