If the current through and voltage across an element are
Want to see the full answer?
Check out a sample textbook solutionChapter 14 Solutions
EBK INTRODUCTORY CIRCUIT ANALYSIS
- Given a tee connected system with power factor of 80 percent and true power of 2,500 kW. Calculate the reactive power.arrow_forward-A series circuit of two pure elements has the following applied voltages and resulting currents of 282.843 sin (314.159t + 30°) volts and 7.071 sin (314.159t - 23.13°) amperes respectively. What is the magnitude of the reactance of the circuit in ohms? -Two electrical loads are in operation: Load 1 consumes 10 kW at 0.8 pf lagging and Load 2 has an apparent power of 25 kVA at 0.6 pf lagging. What is the reactive power of load 1 in kVAR? -A series circuit of two pure elements has the following applied voltages and resulting currents of 282.843 sin (314.159t + 30°) volts and 7.071 sin (314.159t - 23.13°) amperes respectively. What is the magnitude of the voltage in polar form? -A impedance of Z = 15∠ 35° ohms is connected across a source with a voltage of 207.846 sin (157.08t) volts. For the circuit, what is the frequency in hz?arrow_forwardWhen can an ac-voltage, v = 120 sin120πt reach its first peak? a. 4.167 μs b. 8.334 μs c. 4.167 ms d. 8.334 msarrow_forward
- In the circuit given in Figure 2 vs(t)=√2.50 cos(4t+60°) a) Calculate the equivalent load impedance. Indicate whether the load is inductive or capacitive. B) Calculate the load current load. Write the expression for the time dependent i(t). C) Calculate the load voltage. Write the expression for time dependent v(t) d) Calculate the active, reactive and apparent power of the load. Determine the power factor Y=3arrow_forwardQ2 In Industry, three Inductive loads, each of resistance R = 32 ohms and inductance L = 0.04 H are connected in Delta to a 425 V, F = 50 Hz, 3 phase supply. Find the following below: i) Phase Impedance, Zp = ii) Phase Voltage, Vp = iii) Phase current, Ip = !3! iv) Line current, I= iiv) The Total Power Consumed, P=arrow_forwardIn Industry, three Inductive loads each of resistance R = 34 ohms and inductance L = 0.05 H are connected in star to a 400 V, F = 50 Hz, 3 phase supply. Find the following below: Phase voltage, Vp = Phase current, IP= Line Current, IL= The Total Power Consumed, P = The value of neutral current, IN =arrow_forward
- Suppose there is no power lost in the wires used to distribute power in a typical home. The following voltages and currents are calculated for thecomponents:va=120 V ia=−10 Avb=120 V ib=10 Avf=−120 V if=3 Avg=120 Vvh=−240 V ih=−7 AIf the power in this modified model balances, what is the value of thecurrent in component g?arrow_forwardpower system has a base power rating of 154 kVA and a base impedance of 24ohm. The system is experiencing a bit of a power surge and is current running at I = 0.85pu V = 0.7pu Z = 0.72 pu, and S= 1.2 pu. What are the actual values of the current, voltage, impedance, and power of the system?arrow_forwardGiven the voltage υ(t) = 120 cos (314t + π/4) V, determine the frequency of the voltage in Hertz and the phase angle in degrees. (Answer: 50 Hz ; 45°) 2- Three branch currents in a network are known to be i1(t) = 2 sin (377t + 45°) A i2(t) = 0.5 cos (377t + 10°) A i3(t) = - 0.25 sin (377t + 60°) A Determine the phase angles by which a) i1(t) leads i2(t) b) i1(t) leads i3(t).arrow_forward
- Three Impedances each of (6 – j20)Ω are connected in mesh across a three-phase 415V ac supply. Determine the phase current, line current, active power, reactive power and apparent power drawn from supply. phase current (Ip) Answer for part 1 Line current Answer for part 2 real power Answer for part 3 reactive power Answer for part 4 Apparent power Answer for part 5arrow_forwardQuestion oneA balanced star connected load comprises of 20 ohm resistance and 0.07 Henry inductance in each branch. If the load supplied with 415V at 50Hz, calculatea) the line currentb) the power factorc) the total power supplied to the load PLEASE FOLLOW THIS APPROACH TO SOLVE THE QUESTION. THANK YOUStep OneDeduce the inductive reactance.STEP TwoWrite down a rectangular expression for the impedance per branch.STEP ThreeConvert the rectangular expression into polar expression.STEP FourBecause impedance will be involved in the analysis deduce the phase voltage.STEP FiveSolve for the phase current and hence the line current.STEPVSixUse the phase angle of the current to deduce the power factor. STEP SevenFind the apparent power.arrow_forwardA generator is rated 100 MW, 13.8kV and 90% power factor. The effectiveresistance is 1.5 times the ohmic resistance. The ohmic resistance isobtained by connecting two terminals to a DC source. The current andvoltage are 87.6 A and 6 V respectively. What is the DC resistance perphase? What is the effective resistance per phase? Whole Solutionarrow_forward
- Introductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. BoylestadPublisher:PEARSONDelmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage LearningProgrammable Logic ControllersElectrical EngineeringISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
- Fundamentals of Electric CircuitsElectrical EngineeringISBN:9780078028229Author:Charles K Alexander, Matthew SadikuPublisher:McGraw-Hill EducationElectric Circuits. (11th Edition)Electrical EngineeringISBN:9780134746968Author:James W. Nilsson, Susan RiedelPublisher:PEARSONEngineering ElectromagneticsElectrical EngineeringISBN:9780078028151Author:Hayt, William H. (william Hart), Jr, BUCK, John A.Publisher:Mcgraw-hill Education,