Diode Tester

What is the primary purpose of a pn junction diode?

• To amplify signals

• To act as a switch

• To allow current to flow in one direction

• To store electrical charge

What occurs at the junction of a pn diode?

• Electron-hole pairs are created

• Electrons move from the n-type to the p-type material

• Holes move from the p-type to the n-type material

• A depletion region is formed

Which of the following is true when a pn junction diode is forward biased?

• The depletion region widens

• The diode blocks current flow

• The diode allows current to flow

• The voltage across the diode increases

What is the typical forward voltage drop of a silicon pn junction diode?

• 0.3 V

• 0.7 V

• 1.2 V

• 1.5 V

What happens to the depletion region when a pn junction diode is reverse biased?

• It becomes conductive

• It disappears

• It narrows

• It widens

Which of the following is NOT a typical application of a pn junction diode?

• Rectification

• Voltage regulation

• Signal modulation

• Radio transmission

What is the main difference between a zener diode and a regular pn junction diode?

• Zener diodes can conduct in reverse bias

• Zener diodes have a higher forward voltage drop

• Zener diodes are used for rectification

• Zener diodes do not have a depletion region

In a pn junction, what are the majority carriers in the n-type material?

• Holes

• Electrons

• Positive ions

Which of the following best describes the behaviour of a pn junction diode in reverse bias?

• It conducts a large current

• It conducts a small leakage current

• It conducts no current

• It amplifies the input signal

What is the effect of temperature on the forward voltage drop of a pn junction diode?

• It increases with temperature

• It decreases with temperature

• It remains constant

• It fluctuates randomly