Question

calculating the resistance of a lamp
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?
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Explanation:

Step1: Recall Ohm's law

Ohm's law is $V = IR$, where $V$ is voltage, $I$ is current, and $R$ is resistance. We want to find $R$, so we can re - arrange the formula to $R=\frac{V}{I}$.

Step2: Substitute given values

We are given that $V = 120$ V and $I = 1.5$ A. Substituting these values into the formula $R=\frac{V}{I}$, we get $R=\frac{120}{1.5}$.

Step3: Calculate the resistance

$R=\frac{120}{1.5}=80$ $\Omega$.

Answer:

80