Lectures on Physics has been derived from Benjamin Crowell's Light and Matter series of free introductory textbooks on physics. See the editorial for more information....

Q of a radio receiver

Question: A radio receiver used in the FM band needs to be tuned in to within about 0.1 MHz for signals at about 100 MHz. What is its Q?

Solution: Q = f res / FWHM =1000. This is an extremely high Q compared to most mechanical systems.

Last Update: 2009-06-21