Q:  Determine the KCL equations for node A, B, C and D.

Solution:

            We need to write down the equations for nodes A, node B, node C and node D.

For node A

                                     -5mA + 8mA + 4mA =0        // according to KCL equation

Now for node B

                                                I₁ - I₂ + 5mA =0                     // according to KCL equation

Now for node C

                              -I₁ - 2mA + 3mA - 8mA =0          // according to KCL equation

And for node D

       -4mA - 3mA + I₃ = 00                                           // according to KCL equation