Find I0 in the network in Fig. P2.56.Figure P2.56

Calculate the value of current in resistance.

Write the Kirchhoff’s current law equation at top node.

Substitute for .

…… (1)

From Figure P2.55, the parallel combination of and resistor is in series with resistor.

Determine the equivalent resistance.

Draw the modified circuit diagram.

Figure 1

From Figure 1, the voltage across resistance is equal to voltage across resistance.

Substitute for in equation (1).

Therefore, the value of current, is .