Question 4 For the voltage-divider circuit shown: Part (A) Calculate the no-load voltage vo.  Part (B) Calculate the power dissipated in R1 and R2. Part (C) If only 1 W resistors are available and that the no-load voltage is to be the same as in Part (A), specify the smallest values of R1 and R2.

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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.