In order to have a constant current through a wire, the potential difference across its ends should be:
Correct answer: D. Maintained constant
- A. Increasing
- B. Decreasing
- C. Zero
- D. Maintained constant
Explanation
To have a constant current through a wire, a constant potential difference (voltage) needs to be maintained across its ends. This constant potential difference ensures a consistent electric field along the wire, which drives the flow of charges (current) at a steady rate. Therefore, option D is the correct choice.
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About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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