Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

The Structure and Operation of Potential Dividers and Potentiometers A potentiometer (or pot for short) is a variable resistor. Usually, this is a three-terminal resistor where the centre connection is manipulable. If two terminals are used (middle and end), it acts as a variable resistor. If all three are used, it acts as a variable voltage divider. A common application for such devices is as a volume control in audio equipment. A potentiometer is constructed as a flat circular graphite contact to generate resistance, with a wiper on an axle connected to the center terminal. This wiper typically travels just under one revolution around the contact. However, multiturn potentiometers also exist, where the contact may be helical and the wiper may move 10, 20, or more turns. In addition to graphite, other materials may be used for the resistive element, such as resistance wire, carbon particles in plastic or a...

To see the full version of this document, and 145,348 others