Temperature coefficient of resistivity of a semi-conductor:
Correct answer: C. Negative
- A. Constant
- B. Positive
- C. Negative
- D. Variable
Explanation
The temperature coefficient of resistance of a semiconductor is negative. It means that resistance decreases with the increase in temperature. This results in a higher number of charge carriers available for recombination, increasing the conductivity of the semiconductor.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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