In a potentiometer circuit, if the length of the wire is doubled, what happens to the potential difference across the wire?
Correct Answer: Potential difference doubles.
- Step 1: Understand that a potentiometer is a device that measures voltage by using a wire.
- Step 2: Know that the potential difference (voltage) across the wire is related to its length.
- Step 3: Realize that the potential gradient (voltage per unit length) remains constant when the wire is uniform.
- Step 4: If you double the length of the wire, you also double the total potential difference across it.
- Step 5: Conclude that doubling the length of the wire results in doubling the potential difference.
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