10:56Electrical Engineering: Ch 12 AC Power (36 of 58) How to Calculate the Power Factor?Michel van Biezen318views
07:15Electrical Engineering: Ch 12 AC Power (10 of 38)What is Average Power Supplied and Absorbed?(-26.5)Michel van Biezen326views
03:14Electrical Engineering: Ch 12 AC Power (16 of 38) How to Find Maximum Power Transferred?Michel van Biezen274views
13:54AC Theory: How to Calculate Power Factor in an AC Circuit: What is Power Factor?Joe Robinson Training772views
04:57Electrical Engineering: Ch 12 AC Power (2 of 38) Instantaneous Power: A Closer LookMichel van Biezen286views
20:27Power Factor - Basic Introduction - Reactive and Apparent Power.The Organic Chemistry Tutor551views
Textbook QuestionA resistor with R = 300 Ω and an inductor are connected in series across an ac source that has voltage amplitude 500 V. The rate at which electrical energy is dissipated in the resistor is 286 W. What is (a) the impedance Z of the circuit; (b) the amplitude of the voltage across the inductor; (c) the power factor?374views
Textbook QuestionThe power of a certain CD player operating at 120 V rms is 20.0 W. Assuming that the CD player behaves like a pure resistor, find (a) the maximum instantaneous power.201views
Textbook QuestionIn an L-R-C series circuit, the components have the following values: L = 20.0 mH, C = 140 nF, and R = 350 Ω.The generator has an rms voltage of 120 V and a frequency of 1.25 kHz. Determine (a) the power supplied by the generator and (b) the power dissipated in the resistor.438views
Textbook QuestionAn L-R-C series circuit with L = 0.120 H, R = 240 Ω, and C = 7.30 μF carries an rms current of 0.450 A with a frequency of 400 Hz. (a) What are the phase angle and power factor for this circuit?183views
Textbook QuestionAn L-R-C series circuit is connected to a 120-Hz ac source that has V_rms = 80.0 V. The circuit has a resistance of 75.0 Ω and an impedance at this frequency of 105 Ω. What average power is delivered to the circuit by the source?273views
Textbook QuestionA series ac circuit contains a 250-Ω resistor, a 15-mH inductor, a 3.5-μF capacitor, and an ac power source of voltage amplitude 45 V operating at an angular frequency of 360 rad/s.(a) What is the power factor of this circuit?195views
Textbook QuestionA generator consists of a 12-cm by 16-cm rectangular loop with 500 turns of wire spinning at 60 Hz in a 25 mT uniform magnetic field. The generator output is connected to a series RC circuit consisting of a 120 Ω resistor and a 35 μF capacitor. What is the average power delivered to the circuit?89views
Textbook Question(II) The peak value of an alternating current in a 1750-W device is 6.1 A. What is the rms voltage across it?6views
Textbook Question(II) An 1800-W arc welder is connected to a 660 -Vᵣₘₛ ac line. Calculate (a) the peak voltage and52views
Textbook Question(II) An 1800-W arc welder is connected to a 660 -Vᵣₘₛ ac line. Calculate (b) the peak current.53views
Textbook Question(II) A heater coil connected to a 240-Vᵣₘₛ ac line has a resistance of 32Ω. (b) What are the maximum and minimum values of the instantaneous power?9views
Textbook Question(II) An average power output of 150 W is sent into a 4-Ω loudspeaker (see Fig. 25–14). What are the rms voltage and the rms current fed to the speaker(b) at 1.0 W when the volume is turned down?<IMAGE>33views
Textbook Question(II) Show that the power delivered by a three-phase ac source equals a constant P = 3Vo²/2R, by combining the four equations in Section 30–11.29views
Textbook QuestionAn ac voltage source V = Vo sin (ωt + 90°) is connected across an inductor L and current I = Io sin (ωt) flows in this circuit. Note that the current and source voltage are 90° out of phase. (a) Directly calculate the average power delivered by the source over one period T of its sinusoidal cycle via the integral P = ∫₀ᵀ V I dt/T. (b) Apply the relation P = Iᵣₘₛ Vᵣₘₛ cos Φ to this circuit and show that the answer you obtain is consistent with that found in part (a). Comment on your results.29views
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