The specific resistance of a conductor increases with which of the following?
Correct answer: A. Increase in temperature
- A. Increase in temperature
- B. Increase in cross-sectional area
- C. Decrease in length
- D. Decrease in cross-sectional area
Explanation
Option A is correct since by increasing the temperature, the specific resistance of a conductor increases, and a semiconductor decreases.Note: Because specific resistance depends upon the value of the temperature coefficient of the resistance, the value of temperature coefficient for conductors is positive Therefore, by increasing the temperature, the specific resistance of a conductor increases.
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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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