Exploring Semiconductor Devices

What is the function of a diode in a circuit?

• To store electrical energy for later use.

• To increase the voltage in a circuit.

• The function of a diode in a circuit is to allow current to flow in one direction only.

• To measure the current flowing through a circuit.

Name two common applications of diodes.

• Voltage regulation and power amplification

• Thermal management and insulation

• Data storage and retrieval

• Rectification and signal modulation

Explain the principle of operation of a PN junction diode.

• A PN junction diode amplifies electrical signals.

• A PN junction diode allows current to flow in one direction (forward bias) and blocks it in the opposite direction (reverse bias).

• A PN junction diode is used to store electrical energy.

• A PN junction diode allows current to flow in both directions.

What is the difference between a Zener diode and a regular diode?

• A Zener diode is used for high-frequency applications, while a regular diode is used for low-frequency applications.

• A Zener diode has a higher forward voltage drop than a regular diode.

• A Zener diode can only conduct in reverse bias, while a regular diode can conduct in both directions.

• A Zener diode can regulate voltage in reverse bias, while a regular diode only allows forward current.

Describe the role of a transistor in electronic circuits.

• A transistor acts as a resistor in circuits.

• A transistor stores data in memory circuits.

• A transistor controls current flow and amplifies signals in electronic circuits.

• A transistor generates power for devices.

What are the three Operating regions of a bipolar junction transistor?

• Active, Saturation, Cut-off

• source, drain, substrate

• input, output, ground

• emitter, base, collector

How does current flow in a bipolar junction transistor?

• Current flows only through the collector terminal.

• Current flows through a BJT by the movement of charge carriers: electrons in NPN and holes in PNP, with the base current controlling the collector current.

• Charge carriers are only holes in NPN transistors.

• The base current is irrelevant to the operation of the transistor.

What is the purpose of biasing in transistor circuits?

• To reduce power consumption in the circuit

• To increase the gain of the transistor

• The purpose of biasing in transistor circuits is to establish a stable operating point.

• To prevent overheating of the transistor

What role do operational amplifiers play in analog signal processing?

• Operational amplifiers are used to amplify weak signals and perform mathematical operations on them.

• Operational amplifiers are primarily used for digital signal processing.

• Operational amplifiers are only used in power supply circuits.

• Operational amplifiers are not used in modern electronics.

what is the operating point of a transistor is known as

• cut off point

• flood point

• saturation point

• Quiescent point