This printout should haw 10 questions Multiplechoice quart i

This print-out should haw 10 questions. Multiple-choice quart ions may continue on the next column or page - find all choices before answering. A circuit contains only a 51. 8 ohm resistor. An AC voltage of peak value 336 V and frequency 60. 5 Hz is applied to this circuit. What is the raw current? Answer in units of A. An inductor has a 54. 4 ohm reactance at 60 Hz. What will be the maximum current if this inductor is connected to a 50 Hz source that produces a 124. 2 V rms voltage? Answer in units of A. What maximum current is delivered by an AC generator with maximum voltage 21. 9 V and frequency 96. 4 Hz when connected across a 2. 02 mu F capacitor? Answer in units of mA. In a series RLC AC circuit, the resistance is 30 ohm. the inductance is 37 mH. and the capacitance is 22 muF. The maximum potential is 151 V. and the angular frequency is 100 rad/s. Calculate the maximum current in the circuit. Answer in units of A. A 104 ohm resistor is connected in series with a 69 mH inductor and a 0. 2 muF capacitor. The applied voltage has the form = 190 V sin(2 pi f t), where the frequency is f = 864 cycles/s. Find the rms current. Answer in units of A. Find the rms voltage across R. Answer in units of V. Find the rms voltage across L. Answer in units of V. Find the rms voltage across C. Answer in units of V. A 0. 217 H inductor is connected to a capacitor and a 17. 2 ohm resistor along with a 39. 8 Hz, 32. 6 V generator. To what value would the capacitor have to be adjusted to produce resonance? Answer in units of muF. Find the voltage drop across the resistor at resonance. Answer in units of V.

Solution

2) 54.4 ohms at 60 Hz means at 50 Hz

= (50/60) * 54.4 = 45.33 ohms

current = 124.2 / 45.33 = 2.74 amps

peak current = 2.74 x 1.414

= 3.87A

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3) I_max = delta V_max / X_C = 2 pi f C (delta V_max)

= 2 pi * 96.4 * 2.02 * 10^-6 * 21.9

= 0.0268 A = 26.8 mA