The temperature coefficient of a normal conductor is negative because:
Correct answer: B. Resistance decreases with an increase in temperature
- A. Resistance increases with an increase in temperature
- B. Resistance decreases with an increase in temperature
- C. Resistance decreases with decrease in temperature
- D. Resistance is independent of temperature change
Explanation
A negative coefficient for a material means that its resistance decreases with an increase in temperature. Option B is therefore the correct answer.Note: Semiconductor materials (carbon, silicon, germanium) typically have negative temperature coefficients of resistance.
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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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