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Unformatted text preview: PHYS309, Spring 2010 February 10, 2010 Test on the AC circuits Please right clearly, explain your reasoning, and submit your solution on a separate piece of paper with your name on it. 1 Problem (A) In the electric circuit shown in the Figure find the complex amplitude and the absolute value of the voltage across the capacitor. L R C E Figure 1: Extra credit sections ( If you attempt an extra credit section, you agree to the following grading. Correct answer to each extra credit section gives you 50% more points. A wrong answer gives you a 15% penalty. There is no penalty if you do not attempt the section. ) (B) Find the exact value of the frequency ω at which the voltage on the capacitor reaches its maximum. (C) In the limit RC √ LC find the approximate expression for the voltage at the maximum point. Solution : (A) Denote the current flowing through the capacitor as I c and the current flowing through the resistor as I r . Then the current flowing through the 1 inductance and source is...
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This note was uploaded on 12/13/2011 for the course PHYS 309 taught by Professor Staff during the Spring '10 term at South Carolina.
- Spring '10