[SOLVED] Relation between resistance and frequency

[siddarth.ghaste]

HI,
What is the relation between resistance and frequency???

 

[mf1364]

HI,
What is the relation between resistance and frequency???

totally there is no linear relation between resistance and frequency in the low frequency but maybe the resistors show Inductance features in the high frequency

 

[siddarth.ghaste]

Okay thanks, it increases or decreases in high frequency???

 

[nitishn5]

If you are talking about Ideal components, there is no effect of a resistor on frequency.
If you are making some RC / RL / RLC filter type circuit, then the value of R affects the response of the circuit at different frequencies. But this effect is not due to the Resistor alone, but mainly due to the Capacitor and/or Inductor present along with the resistor.

If you are looking at real components, a resistor will have some stray inductance due to how it is made.

 

[siddarth.ghaste]

Okay, The effect will be more or less??

 

[nitishn5]

Which effect?
In real components or in RC/RL/RLC circuits?
What do you mean by "more or less"?

 

[siddarth.ghaste]

Sorry for wrong reply,what will be the effect on resistor....

 

[nitishn5]

I think you are asking what happens to a resistor at high frequencies.

A real resistor can be lumped as R_eff = R +ωL. That is a Resistor and an Inductor in series.
R is the nominal value of the resistor.
L is the stray inductance.
The value of L will be very small in the order of nH (10^-9H)

Therefore at low frequencies, the The effective impedance would be R_eff ≈ R
But at very high frequencies say ω = R/2πL and higher, the Inductance value will dominate and the R_eff would be much higher.
And it will increase with frequency.

 

[siddarth.ghaste]

Okay thanks alot...

 

[Ow@i$]

Have a look:

https://www.groupdiy.com/index.php?topic=34674.0