Postby **TGTS0907129**»
Series circuits containing resistance inductance

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Consider an ideal case of a series circuit containing pure resistance without inductive or capacitive effects), pure inductance (without resistance or capacitive effects), and pure capacitance (without resistance or inductive effects). The voltage V_L across the inductive coil is 90°. Hence the net reactive voltage V_{L }- Vc and is designated V_{x}

V_{x }= IX = IX_{L} - IX_{c} = I(X_{L} - X_{c} )

It follow that the net reactance X of the series circuit is X = X_{L} - X_{C}

The ideal case represented never exists in practice. The resistor usually contains more or less inductance; the inductor necessarily includes some resistance; the capacitor may have sufficient losses to offer appreciable equivalent resistance. However, the phase diagram of the voltages in such a circuit may be reduced to one where in this case V_{R} represents the voltage across all the resistance in the circuit V_{L} the total in inductive voltage of the circuit, and V_{c} the total capacitive voltage. As before, V_{x} represents the net reactive voltage and V the voltage of the entire circuit.

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