Understanding Semiconductors and Diodes

Front

Semiconductor

Back

A semiconductor is a material that can conduct electricity under certain conditions, used in electronic devices.

Front

How do semiconductors differ from conductors and insulators?

Back

Semiconductors differ from conductors and insulators in that they have variable conductivity, allowing them to conduct electricity under specific conditions.

Front

What is the role of doping in semiconductors?

Back

Doping increases the conductivity of semiconductors by introducing charge carriers.

Front

Explain the function of a diode.

Back

A diode functions as a one-way valve for electric current.

Front

What is the difference between a PN junction diode and a Zener diode?

Back

The main difference is that a PN junction diode is used for rectification, while a Zener diode is used for voltage regulation.

Front

How does a diode allow current to flow in one direction?

Back

A diode allows current to flow in one direction by being forward-biased, which enables charge carriers to move and create current.

Front

What is the forward bias and reverse bias in a diode?

Back

Forward bias allows current to flow through the diode; reverse bias blocks current flow.

Front

Describe the I-V characteristics of a diode.

Back

The I-V characteristics of a diode show exponential current increase in forward bias after a threshold voltage and minimal current in reverse bias until breakdown.

Front

What applications utilize diodes in electronic circuits?

Back

Rectification, signal modulation, voltage regulation, protection circuits, LED technology.

Front

What is the significance of the band gap in semiconductors?

Back

The band gap determines the electrical conductivity and behavior of semiconductors.