Question

the current flowing through a lamp is 1.5 a. it is plugged into a 120 - v outlet. what is the resistance of the lamp?

Explanation:

Step1: Recall Ohm's Law formula

Ohm's Law: $R = \frac{V}{I}$ where $V=120\,\text{V}$, $I=1.5\,\text{A}$

Step2: Calculate resistance

$R = \frac{120}{1.5}$

Answer:

80