17. A circuit has an apparent power of 400OVA and a reactive power of 250VAR. Find the power factor of the circuit. 0.625 0.780 0.530 0.848

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Z parameter

The Z-parameters that are the impedance parameters of a two-port network are defined by expressing the two-port voltages V1 and V2 in terms of two-port currents I1 and I2. The Z-parameters are calculated by open circuiting one of the two ports at a time henceforth they are called open-circuit impedance parameters.