Question

What is the potential difference across a computer power supply with a resistance of 50 Ω, if the power supply draws a current of 2.2 A?

Answer 1

Given data:

* The current through the computer power supply is I = 2.2 A.

* The value of resistance is R = 50 ohm.

Solution:

According to Ohm's law, the voltage (potential difference) across the computer power supply is,

$V=IR$

Substituting the known values,

$\begin{gathered} V=2.2\times50 \\ V=110\text{ volts} \end{gathered}$

Thus, the potential difference across the computer supply is 110 volts.