On doping the conductivity of the semi conductor:
Correct answer: B. Increases
- A. Decreases
- B. Increases
- C. Remains same
- D. All of these
Explanation
Doping a semiconductor can increase its electrical conductivity.In N-type doping, the addition of pentavalent impurities increases the number of free electrons in the semiconductor, enhancing its conductivity. Conversely, in P-type doping, the addition of trivalent impurities increases the concentration of positive charge carriers (holes), also augmenting the material's conductivity.By introducing impurities into a semiconductor, whether to create N-type or P-type regions, the overall effect is an increase in the material's electrical conductivity compared to an undoped or intrinsic 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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