## PHYS208 Fundamentals of Physics II

### Hint for Ch. 28, 55P

R_{2} and R_{3} are in parallel, assuming a "perfect" ammeter of 0 ohm
resistance.
This parallel combination is then in series with R_{1} so that the circuit reduces
to a simple equivalent circuit from which the current through the emf
(and R_{1}) may be calculated.
Finally, establish the voltage across the parallel combination and from that deduce the
current through the ammeter (and R_{3}).

"http://www.physics.udel.edu/~watson/phys208/exercises/hints/28-55P.html"

Last updated Feb. 18, 1998.

Copyright George Watson, Univ. of Delaware, 1998.