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Impedance is a measure of the total opposition to an alternating current in a circuit. It is represented by the symbol Z and is measured in ohms (Ω).
Finding equivalent impedance is important because it allows us to simplify complex circuits and make calculations easier. It also helps us understand the overall behavior of a circuit.
Equivalent impedance is calculated by using the formula Zeq = √(Req2 + Xeq2), where Req is the equivalent resistance and Xeq is the equivalent reactance.
In series impedance, the components are connected in a single path and the total impedance is the sum of individual impedances. In parallel impedance, the components are connected in multiple paths and the reciprocal of the total impedance is the sum of the reciprocals of individual impedances.
Yes, impedance can be negative in circuits that contain capacitors or inductors. This is known as reactive or imaginary impedance and is represented by the symbol j.