Fall 2011 Exam 1 Solutions

# Fall 2011 Exam 1 Solutions - Physics 21 Fall 2011 Solution...

This preview shows pages 1–2. Sign up to view the full content.

Physics 21 Fall, 2011 Solution to Hour Exam #1 The graders for the problems were: 1 Tupa, 2 Faust, 3 Beels, 4 Malenda, 5 Glueckstein For questions about the grading, see the grader by Oct. 26. Problem 1. Consider the following circuit: 2 I 1 8V 12 V 6 7 I 2 I 3 ab cd loop 1 loop 2 (a) (13 pts.) Write Kirchho±’s loop and junction (or node) equations needed to determine the currents I 1 , I 2 ,and I 3 . Use the currents and their di- rections speci²ed by the arrows in the diagram. You must write these equations as defned in Physics 21. You should have three equations for three unknowns. Draw clearly and label on the diagram the loop used to determine each loop equation. (b) (3 pts.) Determine the currents I 1 , I 2 I 3 (in- cluding the correct sign) by explicit solution, by hand, of the equations you determined in part (a). You must show your work. (c) (2 pts.) Use the currents you calculated in part (b) to ²nd the potential di±erence V c - V b between the corner points labelled c and b on the diagram, using the path through corner point a . Show your work, including the potential change across any circuit elements on this path.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 5

Fall 2011 Exam 1 Solutions - Physics 21 Fall 2011 Solution...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online