What do the substances whose resistance decreases with increase in temperature have?
Correct answer: B. negative temperature coefficient
- A. high temperature coefficient
- B. negative temperature coefficient
- C. positive temperature coefficient
- D. zero temperature coefficient
Explanation
The substances whose resistance decreases with increase in temperature have negative temerpature coefficient resistance. This behavior is commonly observed in materials like certain metals, such as copper or aluminum.
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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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