Semiconductors and Diodes Quiz

What is the main difference between intrinsic and doped semiconductors?

• Number of holes

• Number of free electrons

• Presence of impurities

• Band gap energy

In a PN junction under forward bias, the depletion region:

• Widens

• Narrows

• Disappears

• Remains unchanged

The ideal diode has which type of I-V characteristic?

• Linear

• Exponential

• Step-like

• Quadratic

Which of the following models is used for analyzing diode forward characteristics?

• Linear model

• Exponential model

• Parabolic model

• Constant current model

In a reverse-biased PN junction diode, the current is primarily due to:

• Majority carriers

• Minority carriers

• Photons

• Electrons only

What is the function of a rectifier in a diode circuit?

• Amplifies signals

• Converts DC to AC

• Converts AC to DC

• Stores energy

What effect does temperature have on a semiconductor diode's operation?

• Increases band gap

• Reduces mobility of charge carriers

• Increases reverse saturation current

• None of the above

Which of the following is NOT a type of diode?

• Zener Diode

• Schottky Diode

• FET Diode

• Light Emitting Diode (LED)

In diode logic gates, the function of diodes is to:

• Amplify signals

• Isolate different circuits

• Act as logical switches

• Generate current

The constant voltage drop model assumes that the diode voltage in forward bias is:

• 0V

• 0.7V for silicon

• 1.1V for silicon

• 0.3V for silicon