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- Is the power factor in Question 6 a leading or lagging power factor? Explain your answer.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.Calculate the capacitance that when placed in parallel with the load, will raise the power factor to unity. Please answer in typing format please ASAP for the like Please
- A 60 Hz sinusoidal voltage v = 141sinwt is applied to a series RL circuit. The values of the resistance and the inductance are 3 ohms and 0.016 henry respectively. a) Compute the rms value of the current and its phase angle with respect to the voltage.b) write the expression of the instantaneous current.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 microfaradA synchronous generator may be represented by a voltage source of magnitude 1.7 p.u. in series with an impedance of 2 p.u. It is connected to a zero-impedance voltage source of 1 p.u. The ratio of X/R of the impedance is 10. Calculate the power generated and the power delivered to the voltage source if the angle between the voltage sources is 30°.
- 2, In a circuit, the capacitance of a capacitor is 3.2 microfarads and the rms voltage of the generator is 50 volts. Frequency (a) 100 Hz and (b) what is the rms current in the circuit when it is 1000 Hz?Suppose I have two peak phasor voltages, V, = 100245° and V, = 75Z-60°. Circle Your Choices: I. The frequencies associated with the phasors are (0 Hz, 60 Hz, 50 Hz, Unknown). II. The rms value of the first phasor is (100, 70.7, 141, 200) volts. III. If you want to add these two phasors, the frequencies must be (60 Hz, 50 Hz, The same, Integer multiples of a given frequency.)When a load is connected to a power line with a frequency of 230V (rms) 50 Hz, it draws 4250 W of power at a power factor of 0.85. Find the required capacitance value to increase the power factor to 0.95.
- Q3 (a) In Figure Q3(a), the load impedance, Zi is adjusted until it absorbs the maximum average power. (i) Determine ZL (ii) Determine the maximum average power, Pmax -j42 j10 2 elll 4) 6 A ZL Figure Q3(a) ww wwA 3 phase 50 Hz alternator is connected to the bus bars through an oil circuitbreaker. Due to short circuit occurring at bus bars, the circuit breaker opens when the r.m.s value of the current was 8000 amperes. The reactance of each phase of the alternator is 2.5 mH and the capacitance to earth between the circuit breaker and the alternator is 1.4 x 10^-7 uF. Determine: (i) Frequency of oscillations(ii) The maximum value of RRRV(iii) Time taken to achieve RRRV value in (ii)A 5-ohm resistor is connected in series with a 25 micro-farad capacitor. A source voltage of 158 volts, 50 Hz supplies the combination. Determine the following: a. Circulating current b. Voltage across the resistor c. Voltage across the capacitor d. Real power supplied by the source e. Reactive power supplied by the source f. Apparent power of the circuit g. Power factor of the entire circuit