Question

if your cell phone is supplied with 5.1 volts and draws 1.5 amps of current, what is its resistance?
3.40 ohms
6.60 ohms
0.29 volts
7.65 volts

Explanation:

Step1: Recall Ohm's Law

Ohm's Law: $R = \frac{V}{I}$ where $V=5.1$ V, $I=1.5$ A.

Step2: Calculate resistance

$R = \frac{5.1}{1.5} = 3.40$ Ohms.

Answer:

A. 3.40 Ohms