Semiconductor Devices Quiz

What is a semiconductor?

• A material with electrical conductivity between conductors and insulators

• A material that allows the flow of current

• A material that has no electrical properties

• A material that does not allow the flow of current

Which of the following materials is considered a conductor?

• Glass

• Rubber

• Copper

• Silicon

What is the maximum number of electrons in the L-shell?

• 8

• 18

• 32

• 2

What type of semiconductor is formed by adding a trivalent impurity?

• N-type

• P-type

• Extrinsic

• Intrinsic

What happens to the depletion region in a forward-biased PN junction?

• It becomes larger

• It remains the same

• It becomes smaller

• It disappears completely

Which of the following is a characteristic of N-type semiconductors?

• They are formed by trivalent doping

• They have no free electrons

• Majority carriers are electrons

• Majority carriers are holes

What is the barrier voltage for silicon semiconductors?

• 0.3V

• 0.7V

• 1.0V

• 1.5V

What is the effect of temperature on leakage current in a reverse-biased PN junction?

• Leakage current is constant

• Temperature has no effect

• Lower temperature increases leakage current

• Higher temperature increases leakage current

Which of the following is a property of intrinsic semiconductors?

• Contains free electrons

• Conductivity is very high

• Extremely pure form

• Doped with impurities

What is the primary reason silicon is preferred over germanium for semiconductors?

• Silicon has better thermal stability

• Silicon has more valence electrons

• Silicon is more expensive

• Silicon is less abundant