PHYS345 Electricity and Electronics

Answer for P3.2

Source substitution leads to the following circuit:

Simplified circuit for P3-2

The current through 900 ohm experiencing 7.0 V is 7.78 mA; thus the current through R2 must be 2.78 mA. Accordingly its resistance must be 1800 ohm.

Last updated Sept. 23, 1998.
Copyright George Watson, Univ. of Delaware, 1998.