Question: Suppose that all wires in the illustrated network have unit resistivity. (a) Write down the incidence matrix A. (b) Write down the equilibrium system for

Suppose that all wires in the illustrated network have unit resistivity.

(a) Write down the incidence matrix A.
(b) Write down the equilibrium system for the network when node 4 is grounded and there is a current source of magnitude 3 at node 1.
(c) Solve the system for the voltage potentials at the ungrounded nodes.
(d) If you connect a light bulb to the network, which wire should you connect it to so that it shines the brightest?

2 3

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