Which one of the following materials has a negative temperature coefficient of resistance?
Correct answer: B. Germanium
- A. Copper
- B. Germanium
- C. Sulphur
- D. Zinc
Explanation
Germanium has a negative temperature coefficient of resistance, indicating that its resistance decreases as temperature increases. This behavior is typical of semiconductors.
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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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