11For RC circuit,
q(t) = qo[1-e - t/Ï„] (Charging Process)
When t = Ï„ , q = (1 - e-1) qo
For LR circuit,
i(t) = io[1-e - t/Ï„] (Growth Stage)
When t = Ï„ , i = (1 - e-1) io
how to find time constant for RC circuit consisting of more than one resistance and capacitance
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18 Answers
1got it dude.................. thx everyone.......................;-)
111arey.. i thought u were sayin somethn serious ther,,,,,,,
e - charge of electron????????
1thx a lot krish..........;-)
do u kno wats d significance of 63.2%???????
11For LR circuits time constant(Ï„) is the time taken for the current in the circuit to reach 63.2% of its peak value.
Ï„ = L/R
1is dis an general formula ????? i ve ever heard abt it..........
then can u pls also tell d def for LR circuit//////////??????? pls.........
11Ï„ = Req.Ceq.
Req. = Equivalent Resistance
Ceq. = Equivalent Capacitance
1can you give any example involving more than one resistance and capacitance
11Remove all Capacitors.You now have only Reesistors in the circuit.Calculate Req.
Do the same for Ceq.
1Req is calculated across capacitor, about which capacitor it is calculated and about which Ceq is calculated
39time constant of an Rc circuit is defined as the time in which 63,2% charging is over in the circuit
39yes that s correct, \tau _{c}=R_{net}C_{net}
first short circuit the battery, then find Rnet and Cnet. but generally no: of capacitors will be only 1