Quiz on Electronic Devices and Semiconductor Concepts

What is the process of adding impurity atoms to an intrinsic semiconductor called?

• Compensation

• Ionization

• Doping

• Doping Agent

Which type of semiconductor is formed by adding pentavalent impurities?

• Intrinsic

• P-type

• Compensated

• N-type

What is the term for the merging of free electrons and holes in a semiconductor?

• Recombination

• Ionization

• Doping

• Excitation

In thermal equilibrium, what is the net charge density of a semiconductor?

• Positive

• Negative

• Varies with temperature

• Zero

According to the law of electrical neutrality, what must be true about positive and negative charges?

• Total positive charges exceed total negative charges

• There is no relationship

• Total positive charges equal total negative charges

• Total negative charges exceed total positive charges

What does the mass action law state?

• The sum of electron and hole concentrations equals the intrinsic carrier concentration

• Hole concentration is always greater than electron concentration

• The product of electron and hole concentrations equals the square of intrinsic carrier concentration

• Electron concentration is always greater than hole concentration

What is the Fermi level?

• The energy level of free electrons

• The energy level of holes

• The lowest energy level an electron can occupy

• The highest energy level an electron can occupy at absolute zero

Which band of energy levels is closer to the nucleus in a semiconductor?

• Energy Gap

• Fermi Band

• Valence Band

• Conduction Band

What type of charge carriers are present in semiconductors?

• Only electrons

• Only holes

• Electrons and holes

• Protons and electrons

What happens when an electron moves from the valence band to the conduction band?

• It creates a hole

• It increases the energy gap

• It decreases conductivity

• It forms a compensated semiconductor