Question

(b) if the voltage is doubled and the resistance is not changed, what will happen to the current in a resistive circuit?

Explanation:

Step1: Recall Ohm's Law

Ohm's Law is given by \( I = \frac{V}{R} \), where \( I \) is current, \( V \) is voltage, and \( R \) is resistance.

Step2: Analyze the change in voltage

Let the initial voltage be \( V_1 \) and the new voltage be \( V_2 = 2V_1 \). The resistance \( R \) remains constant.

Step3: Calculate initial and new current

Initial current: \( I_1=\frac{V_1}{R} \)
New current: \( I_2 = \frac{V_2}{R}=\frac{2V_1}{R} = 2\times\frac{V_1}{R}=2I_1 \)

Answer:

The current will be doubled.