A) 8.586 V B 8.161 V C 8.138 V D 8.511 V
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- alculate the voltage Vs and the current Is. Calculate the phase difference between Vr1 and Vs.7. A source of 100 Volts rms is supplying a resistance 80 ohms in parallel with a 200mH inductor. To what angle is the current lag or lead? A. 46.7 deg. lag B. 43.3 deg. lag C. 46.7 deg. lead D. 43.3 deg. LeadLance 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.
- A public utility is planning to construct a high head hydroelectric facility. The approximate cost for large facilities is $3000 USD per kWe installed. The utility is considering two options, a 600 MWe facility that would operate at a 70% capacity factor or an 800 MW. facility that would operate at a 65% capacity factor. If electricity is sold for $0.13 per kWh, estimate the payback period for the additional infrastructure costs for the larger facility. Ignore the cost recovery factor and operating costs.If E = 1.05 p.u. leading by 25 degrees, feeding infinite bus bar through a reactance of 0.35. Find the reactive power flowing. a. 0.138 b. 1.514 c. 2.618 d. 0.43Find the potential difference Vab. A. 9.6 V B. 9.7 V C. 9.8 V D. 9.9 V
- An industrial load consisting of a bank of induction motors consumes 50 kW at a power factor of 0.8 lagging from a 220-V,60-Hz, single-phase source. By placing a bank of capacitors in parallel with the load, the resultant power factor is to be raised to 0.95 lagging. Find the net capacitance of the capacitor bank in F that is required.Which of the following statement is true? a. Angle between load voltage and load current in a pure capacitive load is 45 degree. b. Angle between load voltage and load current in a pure capacitive load is is 180 degree. c. Angle between load voltage and load current in a pure capacitive load is is zero. d. Angle between load voltage and load current in a pure capacitive load is is 90 degree.A power station is to supply four regions of loads whose peak values are 10,000 kW, 5000 kW, 8000 kW and 7000 kW. The diversity factor of the load at the station is 1.5 and the average annual load factor is 60%. Calculate the maximum demand on the station and annual energy supplied from the station.