Chapter 6.2, Problem 9PP

To determine

To calculate: Resistance of the lamp.

Answer to Problem 9PP

Resistance of the lamp is $\underset{\_}{\text{240 }\Omega }$ .

Explanation of Solution

Given:

Current = $0.5\text{ A}$

The lamp is plugged in a standard wall outlet.

Formula used:

Current is given by,

$I=\frac{V}{R}$

where $V$ is voltage and $R$ is resistance.

Calculation:

Voltage of a standard wall outlet = $\text{120 V}$

Resistance is calculated as:

$\begin{array}{l}I=\frac{V}{R}\\ R=\frac{V}{I}\\ =\frac{\text{120 V}}{\text{0}\text{.5 A}}\\ =240\Omega \end{array}$

Conclusion:

Resistance of the lamp is $\underset{\_}{\text{240 }\Omega }$ .