In the circuit shown below, find the complex power supplied by the source and the source power factor. Also if f=60HE, find v,(1).
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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?d. 565.685 V If a Load absorbs 20 kVA at a leading power factor of 0.6. Then the complex power is: Select one: O a. 12000 - j16000 VA O b.-12000 + j16000 VA O c. 12000 + j16000 VA O d. None of these Given the circuit below and the associated set of voltages and currents, the reactive Power developed by im voltage source is FENG300 MINTERMA 480-V rms source supplies a load that absorbs 100 kW at a 0.7 lagging power factor. A capacitor is then connected in parallel to this load to correct the overall power factor to 0.9 lagging. What reactive power must this capacitor produce to correct the power factor? What will be the resulting rms source current after connecting this capacitor?
- A single phase AC chopper supplies a pure inductive load of 0.02H from 220V, 50HZ AC supply. The triggering angle of the thyristors is 100°. (Assume the circuit is ideal.) a. Sketch the circuit b. Develop the load current expression and find the decay angle of the load current c. Sketch the load voltage and load current waveforms d. Calculate the RMS value of load voltage e. Calculate the RMS value of load current f. If the triggering angle of the thyristors is chosen as 60°. Explain the operation of the circuit.Consider the system in the figure to the right. The Zbus for the system is given as follows: [j0.411 j0.310 j0.3541 Zbusj0.310 j0.446 j0.333 Lj0.354 j0.333 j0.450] j0.8 1.28/0 ele j0.2 vor j2.0 j0.5 m j0.4 m 2 a) Find the voltage at each bus. b) Find the current drawn by a capacitor having a reactance of 5.0 PU connected from bus 3 to the reference. c) Find the change in voltage at each bus when the capacitor is connected at bus 3. d) Find the voltage at each bus after connecting the capacitor. j1.0 1.20/30°8. The total power supplied to a balance delta load is found in the same way as for a balance wye load. True False Either Neither 12. A load of 20 + j35 ohms is connected across a 220 V, 60 Hz supply. Find the reactive power of the load in var. 595 2420 1042 1382 13. A type of DC source where the characteristic output voltage has perfect unidirectional waveform and is based on electrochemical principle. Generator Inverter Converter Battery 14. Calculate the Rf of a circuit whose impedance is 20+j35 and current of 2A. 0.86 0.91 0.50 0.71 15. What capacitor shall be installed in parallel with a circuit to achieve a unity power factor if the reactive power of a circuit is 200VARS and the voltage is 100V. 80.45 microfarad 53.05 microfarad It's already in unity 62.45 microfarad
- Draw the power factor triangle showing the different labelled sides. Illustrate a lagging power factor using a sinusoidal waveform. (d) List 2 negative effects of a poor power factor (e) How can a lagging power factor be corrected?electric units a & b are connected in parallel and its rms current is 15A. If the current in b lags behind a by pi/3 rads and the current is 23.4 A. find the current in b and sketch the equivalent circuit diagramQ2. For the circuit shown below, sketch the current waveforms is and io and determine the Average and RMS for both currents. a = 50° T1 50 2 ot Vs = 300 sin 100rt T2 ot
- When a load is connected to a power line with a frequency of 230V (rms) 50 Hz, it draws 4500 W at a power factor of 0.80. Find the required capacitance value to increase the power factor to 0.85.15 A of current is taken by a non-inductive load at 125 V. In order that the same current shall be generated from 240 V, 50 Hz mains. An inductor is now also then connected in series. Note: The resistance of the inductor should be ignored and also assume the waveform to be sinusoidal. Determine the phase difference between the current and the applied voltage, the impedance of the circuit and the inductance of the inductor.Lance Smile operated two loads in parallel. The loads draw a total of 3kW at a 90% power factor lagging operating at a 230 Vrms 60-hz voltage source. Load 1 is taking 1000 W at 80% power factor lagging. Determine the following: a. The power factor of the second load. b. If a capacitor is connected in parallel with the loads, what is the value of the capacitance needed to correct the power factor to 95% lagging for the combined load.