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Unformatted text preview: karna (pk4534) HW 09 li (59050) 1 This print-out should have 27 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points Consider an LC circuit in which the in- ductance is 633 mH and the capacitance is . 15 F. What is the resonant angular frequency? Answer in units of rad / s. 002 (part 2 of 2) 10.0 points If a 3 . 6 k resistance is introduced into this circuit in series with the inductor and ca- pacitor, what is the angular frequency of the (damped) oscillations? Answer in units of rad / s. 003 (part 1 of 3) 10.0 points An LC circuit is shown in the figure below. The 50 pF capacitor is initially charged by the 7 V battery when S is at position a . Then S is thrown to position b so that the capacitor is shorted across the 17 mH inductor. 17 mH 50 pF 7 V S b a What is the maximum value for the oscil- lating current assuming no resistance in the circuit? Answer in units of A. 004 (part 2 of 3) 10.0 points What is the natural angular frequency of the circuit? Answer in units of rad / s. 005 (part 3 of 3) 10.0 points What is the maximum energy stored in the magnetic field of the inductor? Answer in units of J. 006 10.0 points A fixed inductance 1 . 19 H is used in series with a variable capacitor in the tuning section of a radio. What capacitance tunes the circuit into the signal from a station broadcasting at 7 . 68 MHz? Answer in units of pF. 007 (part 1 of 4) 10.0 points A coil is connected to a 70 Hz, 80 V AC generator. At this frequency, the coil has an impedance of 20 and a reactance of 6 ....
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