# The Naked Scientists Forum

### Author Topic: What is the meaning of effective resistance?  (Read 1496 times)

#### The Scientist

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##### What is the meaning of effective resistance?
« on: 11/07/2010 10:39:53 »
Does it have anything to do with the number of resistors in a circuit? Please answer as detailed as possible. Thank you!

#### Geezer

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##### What is the meaning of effective resistance?
« Reply #1 on: 11/07/2010 17:06:56 »
This does a good job of explaining it

#### tommya300

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##### What is the meaning of effective resistance?
« Reply #2 on: 11/07/2010 20:28:03 »
Does it have anything to do with the number of resistors in a circuit? Please answer as detailed as possible. Thank you!

AC circuitry has a bit different prperties than a static resistance, it is more dynamic.
Instead of the term only "resistance" the dynamic term is reactance. Coils and Capacitor loads are frequency dependent. This is an "effective resistance." All three types of loads work together by design.

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#### syhprum

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##### What is the meaning of effective resistance?
« Reply #3 on: 12/07/2010 06:50:47 »
Could the correspondent have in mind the radiation resistance of an antenna which is a measure of the efficiency of an antenna much shorter than a quarter wavelength and can be very low as the impedance is largely capacitive
« Last Edit: 12/07/2010 08:08:57 by syhprum »

#### Geezer

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• "Vive la résistance!"
##### What is the meaning of effective resistance?
« Reply #4 on: 12/07/2010 06:59:07 »
The correspondent might, in which case, I could not help in the slightest!

#### The Naked Scientists Forum

##### What is the meaning of effective resistance?
« Reply #4 on: 12/07/2010 06:59:07 »