Question

an alarm clock draws 0.5 a of current when connected to a 120 volt circuit. calculate its resistance.

Explanation:

Step1: Recall Ohm's Law

Ohm's Law is \(V = IR\), where \(V\) is voltage, \(I\) is current, and \(R\) is resistance. We need to solve for \(R\), so we can rearrange the formula to \(R=\frac{V}{I}\).

Step2: Substitute the given values

Given \(V = 120\) volts and \(I=0.5\) A. Substitute these into the formula: \(R=\frac{120}{0.5}\).

Step3: Calculate the resistance

\(R=\frac{120}{0.5}=240\) ohms.

Answer:

The resistance of the alarm clock is \(240\) ohms.