If the resistance of a conductor is doubled while keeping the potential difference across its ends constant, what will happen to the current flowing through it?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. It will halve.
According to Ohm's Law, the relationship between voltage (V), current (I), and resistance (R) is given by the formula V = IR or I = V/R. If the potential difference (V) remains constant and the resistance (R) is doubled (2R), the new current (I') becomes I' = V/2R, which is exactly half of the original current (1/2 I). This demonstrates that current is inversely proportional to resistance; as resistance increases, the flow of charge decreases.