Chapter 34, Problem 64A

Use the equation just derived and show that when a device in a 120-V circuit draws a current of 20 A, its resistance is $6\Omega$.

To determine

To show: The resistance of circuit is $6\Omega$

Explanation of Solution

From Ohm’s law, $I=\frac{V}{R}$ . Where R is the resistance

So resistance of circuit, $R=\frac{V}{I}=\frac{120\text{V}}{20\text{A}}=6\Omega$