Semiconductors

Which among these is NOT the property of a semiconductor?

• Four electrons in the valence band forming covalent bonds

• At 0 Kelvin semiconductor acts like an insulator

• Semiconductors have two type of charge carriers

• Semiconductors are temperature insensitive

Which among these is the fundamental characteristic of a p type semiconductor

• Electrons are the majority charge carriers

• Has a tendency to gain an electron

• Has a tendency to donate an electron

• Easy to conduct electricity

Method implemented to increase conductivity is

• Increase electrical field

• Increase temperature

• Increase doping concentration

• Shining light of proper wavelength on the semiconductor

• All of the above

Which among these is NOT a semiconductor

• Germanium

• Silicon

• Gallium Arsenide

• Titanium

Which of the following DOES NOT hold good for a n type semiconductor

• Electron concentration is greater than hole concentration

• Obtained by doping an intrinsic semiconductor with a trivalent impurity

• Dopants are Phosphorous or Arsenic

• Minority charge carriers are holes

Electrons and holes are equal in magnitude but opposite in polarity

• True

• False

The maximum energy that an electron in a metal has at the absolute zero temperature is called

Which semiconductor has higher conductivity at room temperature

• Silicon

• Germanium

• Gallium Arsenide

Which charge carrier has higher mobility?

• Electrons

• Holes

• Both electrons and holes

The electric current produced due to the steady flow of electrons in one direction is called