3) A potential divider is used to provide an output voltage Vo from a 10 V supply as shown below. The supply has negligible internal resistance. X 1-2 kN 10 V Y Vo a) The resistance of resistor X is 1.2 KQ and the output voltage required is 6 V. Calculate the resistance of resistor Y. b) A load resistor Z is now connected across the output as shown below. 1-2 k2 10 V Y Calculate the voltage across resistor Z when its resistance is 4.7 ko

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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.