# Solved Problems-8

Problems-8

Obtain Theveninâ€™s equivalent circuit with respect to terminals

*A*â€“*B*in the networks shown below.Solution

- With
*A*â€“*B*open, the current is,

*I*=

Thevenin voltage,

*V*

_{th}=

=

=

Thevenin impedance,

Thus, the Theveninâ€™s equivalent circuit is shown in the figure.

- Here, Thevenin voltage,

*V*

_{th}=

=

*V*

_{th}=

Thevenin impedance,

*Z*

_{th}=

=

=

Thus, the Theveninâ€™s equivalent circuit is shown in the figure.

Here, with

*A*â€“*B*open, equivalent impedance,âˆ´ Main current,

âˆ´ Thevenin voltage,

âˆ´ Thevenin impedance,

- The circuit is redrawn as shown considering two capacitors in parallel.

âˆµ

Thevenin voltage is given as,

âˆ´ Thevenin impedance,

*To find V*_{th}

With

*A*â€“*B*open, current of the dependent source can flow through the capacitor only.âˆ´

âˆ´ Thevenin voltage,

*To find I*

_{N}Converting the dependent current source into voltage source, by KVL,

and

Solving for

*I*,_{N}âˆ´ Thevenin impedance,