An electric field is generated along the wire when:
Correct answer: C. A constant potential difference is maintained across the wire
- A. A constant potential is maintained across the wire
- B. Net current is zero
- C. A constant potential difference is maintained across the wire
- D. None of these
Explanation
An electric field is generated along a wire when there is a potential difference (voltage) applied across it. This potential difference creates an electric field that drives the movement of charges (current) through the wire. Therefore, when a constant potential difference is maintained across the wire, an electric field is generated along its length, facilitating the flow of electric current.
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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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