题目内容

Current density in the semiconductor are composed of ( ).

A. diffusion current density of holes
B. diffusion current density of electrons
C. drift current density of holes
D. drift current density of electrons

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Hole diffusion coefficient is a positive quantity. ( )

The movement of charge due to electric fields is called ______ .

Ionized Impurity Scattering is a coulomb interaction exists between the electrons or holes and the ionized impurities. ( )

The transport currents of the electrons and holes in a semiconductor will be driven by ( ).

A. electric field
B. density gradient
C. temperature gradient
D. doping content