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'[ee]: how to calculate time constant'
2001\04\07@083124
by
Raj D.kumar
Hi,
If R and C are in parallel how to calculate the time constant.??
Thanks,
Raj
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2001\04\07@095732
by
Chris Carr
Raj D.kumar wrote
> Hi,
>
> If R and C are in parallel how to calculate the time constant.??
>
> Thanks,
>
> Raj
>
Typing "Time Constant" into Google brought up this as the eleventh result
http://www.sweethaven.com/acee/forms/frm1002.htm
Regards
Chris
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2001\04\07@110914
by
Andy Howard
> From: "Raj D.kumar" <spam_OUTDurairaj.RajkumarTakeThisOuTAPCC.COM>
> Hi,
>
> If R and C are in parallel how to calculate the time constant.??
t = R * C seconds, where R is in ohms and C in Farads.
This is the time for a capacitor to charge or discharge through a resistor
by approx 63% (actually 1/e). It applies equally to parallel and series
arrangements.
As an approximation the capacitor will charge or discharge to around 1% of
it's eventual value, i.e fully charged or discharged, in five times the time
constant.
These numbers are theoretical but other factors, e.g. leakage in the
capacitor, will affect the actual result. In general the calculation becomes
less of a match for real-world circuits for higher values of t.
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2001\04\08@104146
by
Olin Lathrop
2001\04\08@114046
by
Olin Lathrop
2001\04\08@130755
by
Andy Howard
2001\04\09@154927
by
Dan Michaels
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