题目内容

With increasing reverse bias, space charge width keeps ()

A. increase
B. decrease
C. unchanged
D. no relationship

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The process whereby electrons and holes are annihilated is called ______ .

( ) is direct bandgap semiconductor.

A. GaAs
B. Si
C. Ge
D. GaP

In the semiconductor of silicon, the mobility ( ) with the increase of temperature.

A. remain unchanged
B. increase
C. decreases

The Boltzmann approximation can be used when the conditions of ( ) are met.

A. The high electron energy
B. The low doping concentration
C. The ordinary semiconductor
D. The high doping concentration

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