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Exam 3 Fall 2011

# Exam 3 Fall 2011 - Midterm Exam Physics 2114 Fall 2011 3...

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Physics 2114 Midterm Exam 3 Professor Bandy Fall 2011 Print Last Name Sec Signature problem 1 (Part I, answer questions a - d, part II questions e - h) (33) part r: In an oscillatin g Li ctrcuitwhere a 4.a0 pF capacrtor exists, the maximum potential difference across the capacitor during thJoscillations is /.5Zand the maximum current through the inductor is 50'0 rnA' ,.!_t: t. sketch and hfr'el tc clcuit at Fig. la space. rndicate current directionlyoul choice) and direction of the induced ' ) E - teta in the inductor. aA . l -+-+*j- @ \)/ .: t. -i|';t--l ..: -. ''' ' -:'{ 1+lt ' i ".;)..' i :i':'i,^-'.;"r '_'.-". --,.r ,=' , I'1,-,-' L *o i l i - il -J -i ;-- , I i { F:----^ rL +."': ' l Figure la'1} Figure 1b - LC Circuitof Part I rRC Circriit from Part II b. Calculate the inductan ce L gyventhatthemarimum eneryin the inductor Uis: Ur =]u = ++ a \-/ ' '30 t- ,s---- c. Ca1culate the frequency/of oscillation, given that at:(LC)-'o -;'.7/ -..-..-- d. t-: q partII: Removethetrrnyourcrcuitandput a\$AC sourae(frequency: I5 k1zandthe anf : lZVeosott)md a resistor (R : /.50 JQ in series with the capacitor. Capacitance is still 4'00 PF' e.

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