Question 1: (3 Marks) If the complex power delivered by the voltage source is S=18 + j9 VA. Find Values of R and L? i(1) 12 cos 41 V R
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If the complex power delivered by the voltage source is S=18 + j 9 VA. Find Values of R and L ?
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- Asap please Complex power for al four elementsGive the detailed solution including formulas used: The metering of a power customer was read and gave the following data: KW-hr = 200,000 KVAR- hr.= 180,000 Maximum demand = 380 kW Billing days = 30. What is the average power factor of the customer? Answer: 0.74329 laggingIn a 25 kVA, 2000/200 V transfer, the iron and copper losses are 350 watts and 400 watts, respectively. Calculate the efficiency at full load and 0.8 power factor lagging. Determine the maximum efficiency and the corresponding load.
- Assume that the voltage at the terminals of the element , whosecurrent was defined , isv=0t<0;v=10e−5000t kV, t≥0.1. Calculate the power supplied to the element at 1 ms.2. Calculate the total energy (in joules) delivered to the circuit element.The voltage and current at the terminals of the element are v=250 cos 800πt V, i=8 sin 800πt A. Find the maximum value of the power being delivered to theelement.Encircle the letter of the correct answer 1.One kW-Hr is equivalent to _______. (a) 1,414.14 BTU per hour (b) 3,600,000 N.m(c) 1,414.14 Cal. per sec (d) 3,600,000 kJ 2. The voltage across any part of a circuit is equal to the _______ of the current in amperes and the resistance in Ohms.(a) difference (b) product(c) sum (d) quotient 3. In a series circuit the current is the _______ in any part of the circuit and the total emf (source) is equal to the _______ of the voltages across each resistor(a) same, sum (b) same, difference(c) same, total (d) sum, same 4. System efficiency when maximum power is transferred or delivered is ______.(a) 60%. (b) 150%.(c) 50%. (d) 200%. 5. In parallel circuit the emf across each resistor is the _____ and the total current is equal to the _____ of all branch currents(a) sum, same (b) same, product(c) same, difference (d) same, sum 6. 1,200 BTU is equivalent to _______ Joules.(a) 302,500 (b) 1,265,554(c) 302,400 (d) 3,600,000 7. Ohm’s Law states that, for…
- Three coils each having resistance 6 and inductance are connected in star with 415V. If the line current is 30 A: a) find the value of inductive reactance as well as inductance value? B) If θ = 45 then calculate the power dissipation in kW when it is connected in Delta.Given the instantaneous voltage ? = 141.4 sin(?? + 30°) expressed in Volts, and current ? = 11.31cos(?? − 30°) in Amps. Determine the following:1.The expression of the instantaneous power equationQ16) The watthourmeter is an example of integrating instrument. The meter is connected with 22.5A, 230V at 0.6 power factor for an hour which rotates 137 revoluation for an one unit of energy. If so, calculate the percentage of error when meter makes 58 revolutions0 a. -66.37% b. -96.8% c. -86.37% d. -76.8%
- At a 115kV substation the PT raatio is 1000:1 and CT ratio is 1,200:5. The potential going into the wattmeter is 115V. What is the actual MW consumed when the wattmeter reads 736W hint: P=V*I Use four decimal places for final answer if necessary.2. The series is shown in the picture below, i(t) = 2 + 10 Cos(t+100) + 6 Cos(3t + 350 Amperre., Calculate the average power it is transmitted from the current source i(t).Q3 Apply (a) Thevenin's theorem and (b) Norton's theorem to calculate current flowing through 5 Ohm resistor. EEP W2150 Electrical Principles