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Exam 2 spring

Exam 2 spring - EE 214 Exam#2 Spring 2006 Instructions This...

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Unformatted text preview: EE 214 Exam #2 Spring 2006 Instructions: This is a closed book, closed notes test. Show all work on all problems. For full credit you must use the method speciﬁed. Place answer in the space provided. ID# 1) For the ideal op amp circuit shown, what range of values of Va will result in linear operation if Vb=9 volts. (20 points) 0" 16 = 1/41- GV+~ 6V4» -ll :1— 1%.»? 42-5143, é 44V “5?: :5 ~6Vé ,2. «aw ~—l»€33 5'4 5’5; 76'? H + " * at»! far * ﬁe/W 2) The op amp in the circuit shown is ideal. Find the output current I, if Va = 1.2 volts, Vb = —1.5 voits, and Vc = 4 volts. (20 points) amps 3) The initial energy in the capacitor is zero and switch A is closed at t=0. Switch B is closed 10 micro seconds later. What is the value of the voltage across the capacitor just after switch 8 closes? (20 points) *zo 1*" i B ’91" /6k 4) The switch in this circuit has been closed for a long time and is opened at t:0. Find the expression for the current i(t) for t 3 0. » (20 points) tr 5 5) If the initial charge on the capacitor is zero and the switch is closed at t=0, find the expression for the voltage across the capacitor. (20 points) my“; Vc(t) = law/52M. mm wow “C”: Kc. r- 5‘0-103~0~1 JO": 51w; ...
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Exam 2 spring - EE 214 Exam#2 Spring 2006 Instructions This...

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