B. Answer 1 and 2 TEST YOURSELF1. A capacitor is connected to a 120-V, 60-Hz supply parallel with a coil with L = 6.63 mH andR = 5. Determine the capacitance value at which the current drawn from the supply is in phasewith the voltage.2. Determine the active and reactive components of the current drawn by a series circuitconsisting of a 1-H coil with 10-ohm resistance and a 150-µF capacitor connected to a 220-V,60-Hz supply mains. Determine the value of the capacitor that must be connected in parallelwith the above series circuit for the circuit's power factor to be unity.3. A 220-V sinusoidal generator drives a parallel section consisting of a 5-µF capacitor in parallelwith a coil with resistance and inductance of 20 ohms and 10 mH, respectively, at its resonancefrequency. Determine the resonance frequency.4. A current source with a source resistance of 50-k is used to power a tank circuit. The tankcircuit having a 50-nF capacitor is connected in parallel with a coil with inductance andresistance of 30-mH and 100-22, respectively. Determine the values of (a) fr and (b) Qcoil.

1. A capacitor is connected to a 120-V, 60-Hz supply parallel with a coil with L = 6.63 mH and R = 5. Determine the capacitance value at which the current drawn from the supply is in phase with the voltage.

1. A capacitor is connected to a 120-V, 60-Hz supply parallel with a coil with L = 6.63 mH and R = 5. Determine the capacitance value at which the current drawn from the supply is in phase with the voltage.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter15: Alternating-current Circuits

Section: Chapter Questions

Problem 48P: A transformer is used to supply a 12-V model train with power from a 110-V wall plug. The train...

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Question

B. Answer 1 and 2

TEST YOURSELF
1. A capacitor is connected to a 120-V, 60-Hz supply parallel with a coil with L = 6.63 mH and
R = 5. Determine the capacitance value at which the current drawn from the supply is in phase
with the voltage.
2. Determine the active and reactive components of the current drawn by a series circuit
consisting of a 1-H coil with 10-ohm resistance and a 150-µF capacitor connected to a 220-V,
60-Hz supply mains. Determine the value of the capacitor that must be connected in parallel
with the above series circuit for the circuit's power factor to be unity.
3. A 220-V sinusoidal generator drives a parallel section consisting of a 5-µF capacitor in parallel
with a coil with resistance and inductance of 20 ohms and 10 mH, respectively, at its resonance
frequency. Determine the resonance frequency.
4. A current source with a source resistance of 50-k is used to power a tank circuit. The tank
circuit having a 50-nF capacitor is connected in parallel with a coil with inductance and
resistance of 30-mH and 100-22, respectively. Determine the values of (a) fr and (b) Qcoil.

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