Question about Capacitor current and electromagnetic induction

  • #1
Esquilo
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Good morning, I can't understand a concept of electromagnetic induction. Then according to Biot Savart's law, at high and alternating currents (amperes) electromagnetic induction occurs in nearby conductors, if instead we have a capacitor (which accumulates a lot of voltage and a few amperes) which discharges into an inductor (RLC circuit) alternating currents and increases inductance, why does electromagnetic induction in nearby conductors not occur in this circuit? Because of the high voltages and low currents (ampere/second) of the capacitor?
 
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  • #2
Esquilo said:
if instead we have a capacitor (which accumulates a lot of voltage and a few amperes) which discharges into an inductor (RLC circuit) alternating currents and increases inductance
I do not understand your characterization of this capacitor. A capacitor accumulates charge and, as a consequence, attains a high potential difference between its terminals. It does not accumulate amperes.

Perhaps you mean to say that a capacitor can attain a large potential difference from a small amperage given sufficient time.

If you discharge such a capacitor through an inductor without a resistor (just a capacitor and an inductor back to back in an LC circuit) that will product an alternating current, yes. This does nothing to change the inductance of the inductor.

If you discharge the capacitor through an inductor in series with a resistor, that is an RLC circuit which may or may not result in an alternating current depending on whether it is overdamped, underdamped or critically damped.

Normally when we look at a circuit diagram, we are adopting a "lumped element" model where no component has any effect on any other component except through the wires in the diagram. The elements only have their nominal behavior. No electromagnetic radiation from any wire or element has any consequence elsewhere in the circuit.
 
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