Question
Download Solution PDFWhich of the following materials has a negative temperature coefficient of resistance?
This question was previously asked in
ISRO (VSSC) Technical Assistant Electrical 2016 Official Paper
Answer (Detailed Solution Below)
Option 3 : Carbon
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Detailed Solution
Download Solution PDF- Temperature coefficient of resistance explains the variation in the resistance by the change in temperature. It is expressed in ohms/ohms°C
- If it is positive, resistance increases with an increase in temperature.
- If it is negative, resistance decreases with an increase in temperature.
Among the given options, carbon has a negative temperature coefficient.
Important Notes:
Semiconductors have a negative temperature coefficient as well.
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