Given is the circuit below The node connected to ground is t

Given is the circuit below. The node connected to ground is the reference node, the voltages at nodes a (Va), b (Vb), and c (Vc) are unknown and have to be determined. The general version of the node voltage analysis tells us to apply KCL at each node with an unknown voltage. The following equation displays the correct KCL for node a:

Solution

For first question

1 Option is correct

Is2 is outgoing and current passing through R1 also out going

Hence both are added.

Is1 incoming

2.for this option 2 is correct

But (Vc-Vd)/R8 is not correct

VC/R8 is correct