1. What are compound semiconductors? Explain the uses of compound semiconductors. 2. Explain the…

1. What are compound
semiconductors? Explain the uses of compound semiconductors.

2. Explain the difference between
metals, insulators and semiconductors with the help of band structure model.

3. Define the term
density-of-state function. Derive an expression for the density-of-state
function of the conduction electrons

in a semiconductor having parabolic
energy bands. Draw the graph of the density of state function versus energy and
explain

the graph.

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