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				| 1. | At what temperature will the resistance of a copper wire become three times its value at 0°C? (Temperature coefficient of resistance for copper = 4 x 10-3 per 0C) | 
| A. | 400 0 c | 
| B. | 450 0 c | 
| C. | 550 0 c | 
| D. | 500 0 c | 
| Answer» E. | |