The electrical network shown below uses a circuit element called a potentiometer (or variable resistor): a) Using Ohm's law, and for different values of the potentiometer resistance, theoretically calculate the voltage and current across the 330 ohm resistor.   Potentiometer resistance Voltage at 330 ohms [V] Current at 330 ohms[mA] 5oo ohms     1 ohm     2 ohms     4 ohms     6 ohms     8 ohms     10 ohms

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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.