With an increase in temperature, the potential barrier
Correct answer: B. decreases
- A. increases
- B. decreases
- C. remains the same
- D. may increase or decrease depending upon the material
Explanation
With an increase in temperature, the potential barrier in a semiconductor junction decreases. This decrease in the potential barrier allows more charge carriers to overcome the barrier, resulting in increased conductivity.Incorrect Options and Explanations: (a) increases - With an increase in temperature, the potential barrier decreases due to increased thermal energy. (c) remains the same - The potential barrier changes with temperature variation in semiconductor junctions. (d) may increase or decrease depending upon the material - The potential barrier generally decreases with an increase in temperature, especially in semiconductor materials.
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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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