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ITEM 9 a. What capacitance must be placed in series with an inductance of 0.05 H so that at 100 Hz, the impedance becomes equal to the ohmic resistance? • 87 HF • 70.7 HF • 35.5 µF • 50 μF b. One million cu meter of water is stored in a reservoir feeding water turbine. If the center of mass of the water is 40 m above the turbine and losses are negligible, how much energy (in MWh) will that volume of water produced? The density of water is 1000 kg/m^3. • 150 . 109 • 135 • 100 a. The load of the customer is more than the rating of the KWH meter so that a current transformer with ratio 400/5 is installed. The KWH meter gives a difference of 85 KWH. What shall be the actual consumption? • 8200 KWH 4300 KWH ● 6800 KWH 5600 KWH

ITEM 9 a. What capacitance must be placed in series with an inductance of 0.05 H so that at 100 Hz, the impedance becomes equal to the ohmic resistance? • 87 HF • 70.7 HF • 35.5 µF • 50 μF b. One million cu meter of water is stored in a reservoir feeding water turbine. If the center of mass of the water is 40 m above the turbine and losses are negligible, how much energy (in MWh) will that volume of water produced? The density of water is 1000 kg/m^3. • 150 . 109 • 135 • 100 a. The load of the customer is more than the rating of the KWH meter so that a current transformer with ratio 400/5 is installed. The KWH meter gives a difference of 85 KWH. What shall be the actual consumption? • 8200 KWH 4300 KWH ● 6800 KWH 5600 KWH

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Solve ITEM 9 with complete GIVEN and STEP-BY-STEP SOLUTIONS.  

ITEM 8 a. At a certain location in an electric system, the available fault MVA is 300 MVA. A 15 MVA, 34.5 kV/6.24kV, 2.5% impedance, wye-wye grounded transformer is installed at that location. Determine the short circuit MVA at the secondary. 195 MVA 300 MVA 200 MVA ● 240 MVA b. An uncharged condenser in series with a 120-V voltmeter of 10,000 ohms resistance is suddenly connected to a 100-V battery. One second later, the voltmeter reads 60 volts. Determine the capacitance of the condenser. 195.76 µF 187.54 µF ● ● ● 190.62 μF 192.23 µF c. Two resistors of resistance 3 and 6, are connected in parallel across a battery having a voltage of 12 V. Determine the current flowing in the 30 resistor. ● 12 A ● 4 A ● ITEM 9 a. What capacitance must be placed in series with an inductance of 0.05 H so that at 100 Hz, the impedance becomes equal to the ohmic resistance? 87 HF ● 70.7 HF ● b. One million cu meter of water is stored in a reservoir feeding water turbine. If the center of mass of the water is 40 m above the turbine and losses are negligible, how much energy (in MWh) will that volume of water produced? The density of water is 1000 kg/m^3. 150 109 ● 135 • 100 ● a. The load of the customer is more than the rating of the KWH meter so that a current transformer with ratio 400/5 is installed. The KWH meter gives a difference of 85 KWH. What shall be the actual consumption? ● 8200 KWH ● 4300 KWH ● 2A 1A 14 yrs 13 yrs ITEM 10 a. In a certain country the equivalent fuel reserve for power generation is 2 x10^6 MW-yrs. The present peak power demand is 200 GW, and the expected power consumption growth rate is 2.1%. How long will the fuel reserve last? ● 2.77 ● 2.06 35.5 μF 50 μF ● ● 6800 KWH 5600 KWH b. The nameplate speed of a 60 Hz induction motor is 1164 rpm. If the speed at no load is 1188 rpm, what is the percent speed regulation? 12 yrs ● 11 yrs 4.24 2.86 c. Suppose that the consumption of energy in a certain country has a growth rate of 5% per year. In how many years will the energy consumption will be tripled? ● 24.66 years 29.33 years • 27.47 years ● 21.97 years
Transcribed Image Text:ITEM 8 a. At a certain location in an electric system, the available fault MVA is 300 MVA. A 15 MVA, 34.5 kV/6.24kV, 2.5% impedance, wye-wye grounded transformer is installed at that location. Determine the short circuit MVA at the secondary. 195 MVA 300 MVA 200 MVA ● 240 MVA b. An uncharged condenser in series with a 120-V voltmeter of 10,000 ohms resistance is suddenly connected to a 100-V battery. One second later, the voltmeter reads 60 volts. Determine the capacitance of the condenser. 195.76 µF 187.54 µF ● ● ● 190.62 μF 192.23 µF c. Two resistors of resistance 3 and 6, are connected in parallel across a battery having a voltage of 12 V. Determine the current flowing in the 30 resistor. ● 12 A ● 4 A ● ITEM 9 a. What capacitance must be placed in series with an inductance of 0.05 H so that at 100 Hz, the impedance becomes equal to the ohmic resistance? 87 HF ● 70.7 HF ● b. One million cu meter of water is stored in a reservoir feeding water turbine. If the center of mass of the water is 40 m above the turbine and losses are negligible, how much energy (in MWh) will that volume of water produced? The density of water is 1000 kg/m^3. 150 109 ● 135 • 100 ● a. The load of the customer is more than the rating of the KWH meter so that a current transformer with ratio 400/5 is installed. The KWH meter gives a difference of 85 KWH. What shall be the actual consumption? ● 8200 KWH ● 4300 KWH ● 2A 1A 14 yrs 13 yrs ITEM 10 a. In a certain country the equivalent fuel reserve for power generation is 2 x10^6 MW-yrs. The present peak power demand is 200 GW, and the expected power consumption growth rate is 2.1%. How long will the fuel reserve last? ● 2.77 ● 2.06 35.5 μF 50 μF ● ● 6800 KWH 5600 KWH b. The nameplate speed of a 60 Hz induction motor is 1164 rpm. If the speed at no load is 1188 rpm, what is the percent speed regulation? 12 yrs ● 11 yrs 4.24 2.86 c. Suppose that the consumption of energy in a certain country has a growth rate of 5% per year. In how many years will the energy consumption will be tripled? ● 24.66 years 29.33 years • 27.47 years ● 21.97 years
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