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Training Time: 34 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English
Diodes and the technology on which they operate form the foundation for most of the electronics that we use every day. These devices are based on a class of elements known as semiconductors. This module will discuss how the atomic properties of semiconductors lead to the electrical behaviors seen in diodes, and how diodes can be applied in basic circuits.
At the end of this module, you will be able to:
The following key questions are answered in this module:
What is an elemental semiconductor? A semiconductor, as the name implies, is an element that is not a particularly good electrical conductor or insulator, it has electrical conduction properties that are between the two.
What process is used to increase the conductivity of elemental semiconductors? The conductivity of an elemental semiconductor can be significantly increased by a process known as doping. This involves infusing a small amount of certain other elements into the atomic structure of a pure semiconductor.
What is the defining electrical characteristic of a diode? A diode will conduct electrical current and allow flow in only one direction. If the polarity of the voltage across the diode is reversed, there will be virtually no current flow.
What is the difference between P-type and N-type semiconductors? When an elemental semiconductor is doped with a trivalent element, the resulting material has an electron deficiency, or holes in the atomic structure. This is called P-type material. N-type material is created by doping with a pentavalent element and the result is a material with extra, loosely held electrons.
What is a common electrical circuit that uses diodes? Diodes are commonly used in rectifier circuits. A rectifier converts alternating current into direct current.
Below is a transcript of the video sample provided for this module:
Use the additional resources and links below to learn more about this topic:
Circuits and Power
View Course
Digital Multimeters and Troubleshooting
Electrical Meters and Measurements
Electrical Soldering
Hand Tools for Electrical Work
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