The quantity Z is called impedence, and it represents effective resistance to the current flow. In complex number representation we may write
Then the combinations of impedences is analogou to those of Resistances. As an illustration the series
LCR circuit solution can be obtained as follows :
Solved Problems
1. A resistance of 100 ohm is connected to a capacitance of 1
mf in series. Find the time constant of the circuit. If a 2 volt D.C. e.m.f. source is connected to the circuit, after how long the p.d. across capacitor will become 0.66 volt?
Solution
2. Find the condition for resonance of a series LCR circuit driven by A.C.e.m.f. source e = e_{0 }
sin(wt).
Solution
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Index
26.1 RC and
LR D.C Circuits
26.2 Reactance and impedance of L,C,R
Chapter
27
