MCQs on Power Semiconductor Devices

What is the main function of power semiconductor devices?

• Signal processing

• Power conversion and control

• Voltage amplification

• Data storage

Which of the following is a key parameter of power diodes?

• Reverse recovery time

• Voltage gain

• Input impedance

• Capacitance

Zener diodes are primarily used for:

• Power switching

• Voltage regulation

• Amplification

• Signal rectification

The avalanche effect in Zener diodes occurs when:

• Forward voltage exceeds a critical level

• Reverse bias voltage exceeds a critical level

• Current through the diode becomes zero

• Forward current reaches saturation

A varactor diode operates based on:

• Reverse breakdown

• Junction capacitance variation

• Forward conduction

• Thermal conductivity

Which of the following is a primary application of varactor diodes?

• Voltage regulation

• Automatic frequency control

• Power rectification

• Signal clipping

Power diodes are typically used for:

• AC voltage amplification

• Rectification of AC to DC

• High-frequency oscillation

• Signal modulation

The term "PIV" in power diodes stands for:

• Peak Input Voltage

• Peak Inverse Voltage

• Positive Input Voltage

• Peak Insulation Voltage

The primary difference between signal diodes and power diodes is:

• Current carrying capacity

• Switching speed

• Forward voltage drop

• Capacitance

Which of the following is a characteristic of a thyristor?

• Bidirectional conduction

• Unidirectional conduction with latching capability

• Continuous control of current flow

• High-frequency operation