Electrical Engineering 40 - Spring 2001 - Howe - Midterm 1

Electrical Engineering 40 - Spring 2001 - Howe - Midterm 1...

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EECS 40 Midterm 1 - Spring 2001 EECS 40 Midterm 1 - Spring 2001 Professor Howe 1. Capacitor Charging/Discharging [17 points] (a) [4 pts] What is the value of the current i (t = 0 + ) in Amperes? The switch moves up at t = 0 and down at t = 50 ps. (note that 1 ps = 10 -12 s). (b) [4 pts] What is the charge q on the + plate of the 1 pF capacitor in pC at t = 50 ps? (c) [4 pts] What is the value of the current i (t = 50 + ps) in Amperes? If you couldn't solve part (b), you can assume for this part that q(t = 50 ps) = 5 pC. Needless to say, this is not the correct answer to part (b). (d) [5 pts] Accurately sketch the waveform vc(t) for 0<t<100 ps on the graph below. The values at t = 0 and 50 ps should be accurate. You can make the same assumption in part (c) if you were unable to solve part (b). file:///C|/Documents%20and%20Settings/Jason%20Raftery/My%20Documents/. ..Engineering%2040%20-%20Spring%202001%20-%20Howe%20-%20Midterm%201.htm (1 of 4)1/27/2007 5:11:41 PM
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This note was uploaded on 05/17/2009 for the course EE 40 taught by Professor Chang-hasnain during the Spring '07 term at University of California, Berkeley.

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Electrical Engineering 40 - Spring 2001 - Howe - Midterm 1...

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