Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 22, Problem 9PP
In an RC parallel circuit, the true power is 780 watts and the reactive power is 560 VARs. Find the power factor.
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A Z load draws 12kVA from a 120 V-rms sinusoidal source with a back power factor of 0.85. Find the average power and reactive power supplied to the load.
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Chapter 22 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 22 - When a capacitor and a resistor are connected in...Ch. 22 - A capacitor and a resistor are connected in...Ch. 22 - What is the impedance of the circuit in Question...Ch. 22 - What is the power factor of the circuit in...Ch. 22 - How many degrees out of phase are the current and...Ch. 22 - Refer to the formulas in Appendix B in the...Ch. 22 - What is the capacitance of the capacitor in...Ch. 22 - A resistor and capacitor are connected in parallel...Ch. 22 - Prob. 1PPCh. 22 - Prob. 2PP
Ch. 22 - Assume that the circuit shown in Figure 22-2 is...Ch. 22 - Assume that the circuit shown in Figure 22-2 is...Ch. 22 - In an RC parallel circuit, R=3.6kandXC=4.7k. Find...Ch. 22 - In an RC parallel circuit,...Ch. 22 - In an RC parallel circuit, ET=120volts,IT=1.2...Ch. 22 - In an RC parallel circuit, the apparent power is...Ch. 22 - In an RC parallel circuit, the true power is 780...Ch. 22 - In an RC parallel circuit, ET=7.5 volts at 1 kHz....
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- Let a 100V sinusoidal source be connected to a series combination of a 3 resistor, an 8 inductor, and a 4 capacitor. (a) Draw the circuit diagram. (b) Compute the series impedance. (C) Determine the current I delivered by the source. Is the current lagging or leading the source voltage? What is the power factor of this circuit?arrow_forwardThe phasor voltage across a certain load is V=10002 ∠30° V, and the phasor current through it is I=152 ∠60° A. Determine the power factor, power, reactive power, apparent power, and impedance. Is the power factor leading or lagging?arrow_forwarda sinusodial source supplies 30 KVAR reactive power to load Z= 250at an angle-75° determine (a) the power factor b) the apparant power delivered to the load and c) the RMS voltage.arrow_forward
- A sinusoidal source supplies 10 kVA to a load Z = 250 Ω ∠- 75°. Determine: (a) the power factor, (b) the reactive power delivered to the load and (c) the maximum voltage.arrow_forwardFor the system in the figure: Find the total average power, total reactive power, total apparent power, and total power factor. Find the current Is (in phasor form). If the loads can be modeled as a resistance in series with a reactive element (capacitor or inductor), find the impedance of each load. Confirm the result of part B using the input voltage and the result of part C. ..arrow_forwardYou also need to draw a phasor diagram of phase load voltages UR,load, US,load, UT,loadarrow_forward
- For the given circuit below a. Calculate E, IR, and IL, in phasor form.b. Calculate the total power factor (leading or lagging) and the average power delivered to the circuit.c. Draw the admittance diagram and draw the phasor diagram of the currents Is, IR, and IL, and the voltage E.arrow_forwardwhat is the reactive power absorbed by the load ZL in VAR? Assume source is in rmsarrow_forwarda. Apply a voltage of 120V at 60Hz to an impedance Z = 50 + 50j Ω as shown. b. Determine the value of C to bring the FP to 1 c. Tabulate the current in the source for different values of C d. Determine when the PF is lagging or leadingarrow_forward
- A circuit has an impedance Z = 2 - j5. What is the power factor?arrow_forwarda) total impedance [ZT] in polar form, b) current [ I ] in phasor form, c) resistor voltage [VR] in phasor form, d) power factor [p.f.] indicating whether leading or laggingarrow_forwardTwo load connected in parallel supplied by 480-V. The first load absorbs 2kVA at 0.5 lagging power factor and the other load absorbs 4kVA at 0.6 leading power factor. Find the total impedance and the rms source currentarrow_forward
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