# Nodal analysis

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###Part 1

Use the node method to find i in the figure below:

Enter the value of i in A.

###Part 2

As always, for the question below, do not use underscores, so enter R_1 as `R1`

, R_2 as `R2`

, R_3 as `R3`

, R_4 as `R4`

, V_S as `VS`

and I_S as `IS`

.

Write a node equation at node e_1 and solve it for e_1, developing an in terms of R1, R2, R3, R4, Vs and Is.
e_1=

Write a node equation at node e_2 and solve it for e_2, developing an in terms of R1, R2, R3, R4, Vs and Is.

e_2=

e_2=