The change in resistance of a metallic conductor below 0°C is:
Correct answer: C. Linear
- A. Non-linear
- B. Curve
- C. Linear
- D. Curvilinear
Explanation
For many metallic conductors, the relationship between resistance and temperature is approximately linear over a wide range, including temperatures below 0°C, until very low temperatures are reached, where quantum effects can become significant.
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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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