Quiz on Semiconductors and Diodes

What happens to the conductivity of an intrinsic semiconductor as the temperature increases?

• Increases

• Decreases

• Remains constant

• Becomes zero

In a PN junction diode, the depletion region is formed due to the recombination of:

• Electrons only

• Holes only

• Electrons and holes

• Ions

The capacitance in a PN junction diode under reverse bias is primarily due to:

• Diffusion capacitance

• Junction capacitance

• Transition capacitance

• Stray capacitance

The current in an ideal diode when reverse biased is:

• Infinite

• Zero

• Very large

• Very small

The constant voltage drop model of a diode assumes a voltage drop of approximately:

• 0.7 V

• 1 V

• 0.3 V

• 0 V

In a diode, the breakdown that occurs due to high electric field at the junction is:

• Avalanche breakdown

• Zener breakdown

• Thermal breakdown

• High voltage breakdown

The forward bias voltage of a silicon diode is typically:

• 0.3 V

• 0.7 V

• 1 V

• 2.2 V

In a PN junction, the width of the depletion region:

• Decreases with reverse bias

• Increases with forward bias

• Decreases with forward bias

• Remains constant

The reverse saturation current of a diode doubles for every:

• 10°C rise in temperature

• 20°C rise in temperature

• 30°C rise in temperature

• 40°C rise in temperature

Which of the following is not a diode model used in circuit analysis?

• Exponential model

• Small-signal model

• Constant voltage drop model

• Linear model