Semiconductors

Which is one of the properties of semiconductor?

• 4 electrons in outermost orbit, in covalent bonding.

• Electron free leaves hole.

• Semiconductor has 2 types of charge carriers.

• all of the above are the properties of it

The process of adding an impurity to an intrinsic semiconductor is called

• Ionization

• Doping

• Recombination

• Atomic modification

The forbiddenn energy gap for Germanium is of the order of

• (a) 0.7 eV

• (b) 0.3 eV

• (c) 1.1 eV

• (d) 10 eV

Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor ?

• Boron 

• Arsenic

• Indium

• Gallium

In semiconductors, conversion from intrinsic to extrinsic is done to:

• Increase conduction

• Increase resistivity

• Increase bandgap

At absolute zero a semiconductor acts like a(n):

• Insulator

• Conductor

• Semiconductor

the donor impurity must have ------- electrons

• 3

• 4

• 5

• 6

In ntype semiconductors minority charge carriers are

• electrons

• holes

• neutrons

• none

What is produced by the doping of silicon with Antimony?

• P type

• n type

• Insulator

• Conductor

Pure semiconductor is

• P type

• n type

• Intrinsic

• Extrinsic