What is the impedance looking from source node in the diagram shown in fig. 1?

What is the unit of impedance?

7.A Super Node analysis could be done when there is a common ___________ between any two essential nodes.(0.5 نقطة)Current sourceResistorVoltage sourceBoth voltage and current source

What is the permanence for the node v in the following network?

What is the magnitude of the impedance between the open terminals in the following at 50 Hz?

The driving-point impedance Z(s) of a network has the pole-zero locations as shown. If Z(0) = 3, then Z(s) is