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- Consider the load convention that is used for the RLC elements shown in Figure 2.2 of the text. A. If one says that an inductor absorbs zero real power and positive reactive power. is it (a) True (b) False B. If one says that a capacitor absorbs zero real power and negative reactive power (or delivers positive reactive power), is it (a) False (b) True C. If one says that a (positive-valued) resistor absorbs (positive) real power and zero reactive power, is it (a) True (b) FalseA source supplies power to the following three loads connected in parallel: (1) a lighting load drawing 10kW. (2) an induction motor drawing 10kVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10hp,85 effIciency and 0.95 power factor leading (1hp=0.746kW). Determine the real, reactive, and apparent power delivered by the source. Also, draw the source power triangle.Convert the following instantaneous currents to phasors, using cos(t) as the reference. Give your answers in both rectangular and polar form. (a) i(t)=5002cos(t30) (b) i(t)=4sin(t+30) (c) i(t)=5cos(t15)+42sin(t+30)
- A 60Hz, single-phase source with V=27730 volts is applied to a circuit element. (a) Determine the instantaneous source voltage. Also determine the phasor and instantaneous currents entering the positive terminal if the circuit element is (b) a 20 resistor. (C) a 10mH inductor, and (d) a capacitor with 25 reactance.41. Ideal inductors and capacitors are in phase with each other. True False "By the convention we are using in this course, if the reactance (X) is positive, it is inductive in nature." True False In series-connected ac circuit, the total current though the circuit is always equal to the phasor sum of the individual current though each element." True False "In a R-L series circuit, R=10 ohms and X=10 ohms, the applied voltage is in phase to the circuit total current (assumed applied voltage is the reference)." True FalseDetermine the values of the resistances, series connected inductances or capacitances of the following impedances ZT in the form (a+jb) and correct to 2 decimal places. ZT = Z1 = (5+j3) Ω ZT = Z2 = -j50 Ω ZT =Z3 = 30 < 600Ω.
- an R-L circuit takes a current of 7amp that lags behind the 231-volt source by 35elec deg. calculate the power factor, power, impedance, resistance, and inductive reactance of the circuit.Sketch the complete phasor diagram showing the branch currents (IA, IB and IC) and voltages (VC and VAB) and the total voltage (V) for the circuit diagram shown in Figure 1.A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R = 10 ohms, L = 20mH and frequency of 1000rad / s, the current measured is 2.2361A at 89.44 leading power factor. A) Determine the initial capacitance. B) However, a fault occurs on the capacitor branch making its capacitance 20% lower and a resistance of 5 ohms is detected. If this faulty circuit is rerun but at a frequency of 500 rad / s, determine the new current that will flow through the circuit.
- AC electrical circuit is below: (refer picture below) a. Determine the current flowing in the load. b. If it is desired that the system power factor be 0.9. With system frequency = 50 Hz. Determine how large the capacitor is must be installed? Which one is correct? A/B/others answer A. C = 7.7015 mF B. C = 35.243 µF c. Please Draw all the phasor. Please give complete, details, and correct answer. Please do step by step, draw the phasor Please using handwriting (not typing ). THANK YOU, I WILL GIVE MANY THUMBS UP.Find the following: the power drawn by the 100ohm variable resistor If the variable resistor is set to 200-ohms, instead of 100-ohms, What is the power drawn by the 200-ohms resistor? total current of the system Is the circuit inductive, capacitive, or neither (resistive)? NOTE: Polar form for Voltage & Current. Rectangular form for ImpedanceA 60Hz sourcewith an effective voltage of 240 volts supplies 4500 volt-amp to a load with a p.f. of 0.75 lagging. Determine the parallel capacitance required to improve the power factor to: a) 0.9 lagging and b) 0.9 leading. What per cent reduction in line current resulted in part (a)?