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Postby TGTS0907129» Electric resonance concept

Describe electric resonance


It is apparent from an inspection of the net reactance term (2πfL-1/2πfc) that it is possible for the inductive reactance to be just equal in magnitude and opposite is sense to the capacitive reactance. In this important special case, since XL - XC = 0, the current and the voltage in the circuit are in phase.in this case the current is a maximum given by I = V/R and the power factor is unity. The current is limited only by resistance, just as if no inductance or capacitance were present.
In a series circuit at resonance the voltage across the inductor and that of the capacitor may each be very large, with only a moderate applied voltage. The inductive voltage is equal in magnitude and opposite in sense to the capacitive voltage. Under these circumstance the current and the applied voltage are in a series ac circuits when XL = XC and the current is a maximum for a given applied potential difference is known as electric resonance.

It should be noted that a given circuit with constant values of inductance and capacitance can be in resonance only for a particular frequency such that 2πfL=1/2πfC. A circuit of given L and C, therefore, has a natural resonant frequency. If the frequency of the impressed voltage equals this resonate frequency the current in the circuits is much large than for higher or lower frequencies

By TGTT06081269 on 9/18/2015 5:23:25 AM
TGTS0907129 on 9/18/2015 5:20:26 AM

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