Physics Questions on Semiconductors and Diodes

Prove that the Fermi energy level lies between valence and conduction bands:

EF = (EV + EC) /2

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Prove that the conductivity of an intrinsic semiconductor increases with increase in temperature.

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What is a P-N junction diode? Explain its characteristics.

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Explain Avalanche and Zener breakdown and Differentiate between them.

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What is a Tunnel Diode? Explain its operation and the concept of quantum tunneling.

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Explain NPN transistor's operation under conditions.

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Explain different types of diodes with proper names and circuit diagrams.

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Explain how NPN transistor differs from PNP transistor. Give circuit diagrams for both.

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Discuss the effect of temperature on the Fermi level in intrinsic and extrinsic semiconductors.

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