## PHYS345 Electricity and Electronics

**Answers for 9/21 Assignment**

**Answer for 4.30**
The effective impedance of the two branches in parallel is
2.3k \/ -8 deg or 2.3k - *j*0.3k

**Answer for 4.38**

The current through the voltage source is 2.1 A \/ -45 deg.

**Answer for 4.39**

The voltage across the current source is 11 V \/ -56 deg.

**Answer for 4.44**

The effective impedance of the network is purely resistive at the specified frequency: 1 ohm.

"http://www.physics.udel.edu/~watson/phys345/protected/exercises/answers/0921.html"

Last updated Sept. 22, 1999.

Copyright George Watson, Univ. of Delaware, 1999.