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18th June 2019, 07:52 #1
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Series rlc and parallel rlc circuits
How can the voltage across a capacitor or inductor in a series RLC circuit be greater than the applied AC source voltage? Also for Parallel RLC, how can the current of anyone branch can be larger than the AC source current?
Please explain to me the mechanism as to how these phenomenon are possible. THANK YOU!

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18th June 2019, 09:47 #2
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Re: Series rlc and parallel rlc circuits
The electrons move back and forth between the capacitor and the inductor.
Compare this movement with a mechanical pendulum. It can move much more than the movement you used to push it.
It is the same with the electrons.

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18th June 2019, 09:48 #3
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Re: Series rlc and parallel rlc circuits
Taking the RLC series circuit as an example, all elements carry the same current, but voltages have different, even opposite phase according to the reactive nature of C and L. The behavior can be best visualized with phasor diagrams. https://en.wikipedia.org/wiki/Phasor
If you reduce R in the linked diagram and make XR and XC more equal, you'll see that the internal voltage can be a large multiple of the external voltage.

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18th June 2019, 13:05 #4
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18th June 2019, 17:06 #5
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Re: Series rlc and parallel rlc circuits
How about in parallel RCL? How can a current in any one branch be greater than the source current?
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