At what temperature will the resistance of a copper wire become three times its value at 0oC (Temperature coefficient of resistance for copper = 4 × 10?3 per oC)
Correct answer: C. 500oC
- A. 400oC
- B. 450oC
- C. 500oC
- D. 550oC
Explanation
C is the correct option temperature coefficient =Rt-Ro/Ro x t (Rt is 3 times Ro) 4×10-3=(12×10-3)-(4×10-3) /(4×10-3) x t t= 500°C
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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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