How is impedance related to inductive reactance and capacitive reactance?
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Impedance is the combination of resistance and reactance. When reactance is present, it creates a 90 degree phase shift between voltage and current, with the direction of the shift depending on whether the component is an inductor or a capacitor. Reactance that occurs in an inductor is known as inductive reactance.
Why is the impedance of a capacitor imaginary?
The fact that ZL is imaginary reflects the fact that the current is π/2 out of phase with the voltage. The phase shift for a capacitor is opposite that for an inductor: the voltage lags the current by π/2, so the phase of the impedance is −π/2: ZC = 1/iωC = (1/ωC)e−iπ/2.
What is imaginary part of the impedance of RLC circuit?
The impedance is the vector sum of the two: Z, equals, square root of, R, squared, plus, X, squared, end square root,Z=R2+X2 . In more advanced work it is convenient to write the impedance as a complex number with the resistance as the real part and the reactance as the imaginary part Z, equals, R, plus, i, X,Z=R+iX.
What is the difference between inductive reactance and capacitive reactance?
If the reactance releases energy in the form of a magnetic field, it is called inductive reactance whereas if the reactance releases energy in the form of an electric field, it is called capacitive reactance. An ideal resistor will have zero reactance, whereas ideal inductors and capacitors will have zero resistance.
What is the relation between reactance resistance and impedance is shown by?
Reactances resist currents without dissipating power, unlike resistors. Inductive reactance increases with frequency and inductance. Capacitive reactance decreases with frequency and capacitance. Impedance represents total opposition provided by reactance and resistance.
Why inductive reactance is imaginary?
This is due to the capacitive / inductive reactance in the circuit. Hence it is thought to be “imaginary” unlike resistance, which is “real”. The combination of reactance X, and the resistance R forms the impedance, Z.