## PHYS345 Electricity and Electronics

**Hint for 3.5**
Here again, there are three non-trivial nodes; at first glance there would seem to be a problem --
three nodal equations and four unknown quantities:
V_{1}, V_{2}, V_{3}, and the unknown current.
However, please notice that V_{3} - V_{2} = 3 V,
which quickly provides the needed fourth equation.

The nodal equation for the middle node may be written as:

(V_{2} - V_{1})^{.}2 + V_{2}^{.}4 + *I* = 0.

"http://www.physics.udel.edu/~watson/phys345/protected/exercises/hints/3-5.html"

Last updated Sept. 13, 1999.

Copyright George Watson, Univ. of Delaware, 1999.