Difference between revisions of "RC--Light Bulb and Capacitor"
From UO Physics Demonstration Catalog
(Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Circuits|file1=}} There are two ways to do this demonstration. One is using a high-voltage power supply of around 120 volts connected to a 10-20 thousand micro-farad capacitor. The power supply is used to charge the capacitor. When the capacitor is fully charged, a light bulb is placed across it. The bulb starts out bright, and then dims. The other way to do this is to use low-voltage light bulbs such as flashlight bulbs...") |
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Using Sound you can hear the effect adding a capacitor in series with a speaker. Connect a speaker to a white noise generator, for example, a stereo amplifier that has a radio FM tuner. Tune to an off station and you can hear the white noise. Hook a capacitor in series to the speaker and you will only hear the high frequencies since as frequency increases, capacitive reactance and total impedance decreases. | |||
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Latest revision as of 20:11, 15 January 2023
Return to Circuits
Description:
Using Sound you can hear the effect adding a capacitor in series with a speaker. Connect a speaker to a white noise generator, for example, a stereo amplifier that has a radio FM tuner. Tune to an off station and you can hear the white noise. Hook a capacitor in series to the speaker and you will only hear the high frequencies since as frequency increases, capacitive reactance and total impedance decreases.
Location:
