Physics Questions on Semiconductors and Diodes

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

EF = (EV + EC) /2

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

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

Explain Avalanche and Zener breakdown and Differentiate between them.

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

Explain NPN transistor's operation under conditions.

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

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

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