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Unformatted text preview: n Lo V2 Your Name: S'vllAh'OV\ (lpt) Prelim 1 EeE 2100, spring 20 I0, Professor Molnar The exam will last 3 hours, you are permitted I singlesided 8.5"x II" crib sheet to be turned in for 9pts. You may also use a calculator. Scrap paper is provided and should be attached: show your work for partial credit. However, answers should be written in the space provided: if we have to go looking for your answer, you will lose 1 point off that answer! If you get stuck on any given part, move on, and come back later. I) (5 pts)Your incompetent lab partner drops all your LEDs on the floor. The colored ones are easy to tell apart, but you have an ultraviolet one and an infered one, and they both look black to you no matter how much current your partner runs through them. How could you use an SMU to tell them apart? (2 sentences). For eaJh l[; () 5 we.ef Va (F~~f'1 /!'vI f'o..)uJlfJ CqVlp~'~ (of' V\('().V~/<;'<{) +0 9~eu(.~\e ,GtV\ l~ to...vve., T~ LbO itv/rlJ\ 't~ e '" \f~eV' +(A {~oV1' vol ~re 17 {VIe. U  Vi 0 V\e ... 2) (1 Opts) Apply superposition to the circuit below to find V I, V2, and V3 first in temlS ofJd, Ie and Vb, then numerically, assuming R = IkQ, Id=200IlA, Ic=lmA and Vb=3V. 1: . L\ 1/(, _ k. ~ LI LtV VI = Vb 2 z... (equation) 1'l (number) ~k .(2..w V2 = Zl6V Vb ' :z: t 7 (equation) (number) V3 = V V)  R Ie. LV (equation) (number) V1cJ Vb  3) Consider the nasty circuit below: it is loaded by resistor RL V1 V2 V3 V4 R R R a. (7 pts)Write, but do not solve, the node voltage equations for this circuit in tenus ofIin, R, VI, V2, V3, V4 and RL. .) ~, Vi/R t (VZ_I1/ Eq for node I: 0  L\ V\ a: 'II Eq for node 2: V~ O =.. 1. f) I"' (VjVz.) 1 ,., L:l"'.""r _ Eq for node 3: O :.  () ~'I!\~'I!...
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 Spring '05
 KELLEY/SEYLER

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