what is voltage magnification and current magnification
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How is voltage magnified in an RLC resonance circuit?
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Cortland Richmond, Soldier, photographer, poet, EMC engineer, studying humans
Answered Nov 30, 2017
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For a parallel resonant circuit, this has to do with the impedance of the reactanceinvolved, the loss in the capacitor and inductor, and the resistance of that and any resistance added.
A circuit is resonant when the opposite phase shifts of the inductor and the capacitor are equal to each other; this effectively renders the combination ZERO ohms, plus whatever resistance they have. At resonance, assuming no resistance and no radiative losses, the current through the circuit is maximized, and the impedance between the ends of the parallel resonant circuit become quite high, which could be much higher than power coupled into it might suggest.
Eli the Iceman:
E (voltage) L (inductance) I (current) -- voltage leads the current across an inductor; the magnetic field of the current induces back EMF, reverse voltage, so current is delayed from the voltage applied as the voltage rises and falls every half cycle.
I (current) C (capacitor) E (voltage) – current leads the voltage across the capacitor; charging the capacitor , current age increases and decreases every positive and negative half cycle,charging it and discharging it every half cycle so it is the voltage that rises and falls with a delay.
inductor and capacitor phase shift
When the two are connected in parallel, the delay in the current traveling through the inductor and the delay current traveling through the capacitor oppose each other and the effective resistance (impedance) of the circuit becomes extremely high.
Put a resistor in series with the circuit, and it will limit the current that can flow in either, reducing the voltage possible.
A useful parallel, though incorrect in almost every way, will be a child playing with water in bathtub. If he moves his hands rhythmically back and forth through the water along the tub’s long axis, he can find a certain timing will cause it to slosh back and forth, and at the timing where it's easiest – the fundamental resonance – he can get the water to slop over the ends with little more effort. He might only move his hands a few inches, but the wave he creates can climb the sloping backrest.
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3 ANSWERS

Cortland Richmond, Soldier, photographer, poet, EMC engineer, studying humans
Answered Nov 30, 2017
Continue Reading
For a parallel resonant circuit, this has to do with the impedance of the reactanceinvolved, the loss in the capacitor and inductor, and the resistance of that and any resistance added.
A circuit is resonant when the opposite phase shifts of the inductor and the capacitor are equal to each other; this effectively renders the combination ZERO ohms, plus whatever resistance they have. At resonance, assuming no resistance and no radiative losses, the current through the circuit is maximized, and the impedance between the ends of the parallel resonant circuit become quite high, which could be much higher than power coupled into it might suggest.
Eli the Iceman:
E (voltage) L (inductance) I (current) -- voltage leads the current across an inductor; the magnetic field of the current induces back EMF, reverse voltage, so current is delayed from the voltage applied as the voltage rises and falls every half cycle.
I (current) C (capacitor) E (voltage) – current leads the voltage across the capacitor; charging the capacitor , current age increases and decreases every positive and negative half cycle,charging it and discharging it every half cycle so it is the voltage that rises and falls with a delay.
inductor and capacitor phase shift
When the two are connected in parallel, the delay in the current traveling through the inductor and the delay current traveling through the capacitor oppose each other and the effective resistance (impedance) of the circuit becomes extremely high.
Put a resistor in series with the circuit, and it will limit the current that can flow in either, reducing the voltage possible.
A useful parallel, though incorrect in almost every way, will be a child playing with water in bathtub. If he moves his hands rhythmically back and forth through the water along the tub’s long axis, he can find a certain timing will cause it to slosh back and forth, and at the timing where it's easiest – the fundamental resonance – he can get the water to slop over the ends with little more effort. He might only move his hands a few inches, but the wave he creates can climb the sloping backrest.
sukanya472:
sorry but i need perfect and concise definition. not lecture page.
Answered by
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. The ratio of voltage across L or C and the supply voltage is called the voltage magnification. That is,
Voltage magnification = voltage across L at resonance/supply voltage at resonance = VL0/V
Also,
Voltage magnification = voltage across C at resonance/supply voltage at resonance =VC0/V
The supply current is much smaller than either of the currents in the L or C branches of the circuit. which means that more current is flowing within the circuit than is actually being supplied to it!
This condition is known as CURRENT MAGNIFICATION.
hope it helps you
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