Question

how does the current in a circuit change if the resistance is doubled? the current is halved. the current is doubled. the current is multiplied by four. the current stays the same.

Explanation:

Ohm's Law states \( I = \frac{V}{R} \), where \( I \) is current, \( V \) is voltage, and \( R \) is resistance. Assuming voltage is constant, if resistance \( R \) is doubled (new \( R' = 2R \)), the new current \( I' = \frac{V}{2R} = \frac{1}{2}I \). So current is halved.

Answer:

A. The current is halved.