For semi conductor to have negative temperature coefficient of resistance implies that
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Correct Answer: Option A
Explanation:
Temperature coefficient of resistance is given by
And for metals where resistance increase with temperature rise, temperature coefficient of resistance is positive; on the other hand in semi conductors, where resistance decrease with temperature rise, temperature coefficient of resistance is negative.
Temperature coefficient of resistance is given by
| __resistance at 0oC |
And for metals where resistance increase with temperature rise, temperature coefficient of resistance is positive; on the other hand in semi conductors, where resistance decrease with temperature rise, temperature coefficient of resistance is negative.