The circuit in Fig 4 has a 60V voltage source, a 10Ω resistor, a 30Ω resistor, a 20Ω resistor, and a dependent current source 5i. The current i is defined as the current flowing through the 10Ω re

Here's a step-by-step solution for question 7, analyzing the circuit in Fig 4.

The circuit in Fig 4 has a 60V voltage source, a 10Ω resistor, a 30Ω resistor, a 20Ω resistor, and a dependent current source $5i$. The current $i$ is defined as the current flowing through the 10Ω resistor from left to right.

Let's label the nodes:

• Let the bottom wire be the reference node (0V).
• Let the node between the 10Ω, 30Ω, and 20Ω resistors be $V_1$.
• Let the node to the right of the 30Ω resistor and above the