Electronic Devices and Communication MCQ with Answers

Doping?is the process of adding impurities to intrinsic semiconductors?to alter their properties. Normally Trivalent and Pentavalent elements are used to dope Silicon and Germanium. When a intrinsic semiconductor?is?doped?with Trivalent impurity it becomes a P-Type?semiconductor.

Motion of hole is a convenient way of describing the actual motion of bound electrons

This?current?is called the diffusion?current. The drift?current?and the diffusion current?make up the?total current?in the conductor. The change in the concentration of the carrier particles develops a gradient. Due to this gradient, an electric field is produced in the?semiconductor.

Impurity atoms with 5?valence electrons?produce n-type semiconductors by contributing extra electrons.

total conduction electrons are contributed by donors and those generated intrinsically