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- Consider the load convention that is used for the RLC elements shown in Figure 2.2 of the text. A. If one says that an inductor absorbs zero real power and positive reactive power. is it (a) True (b) False B. If one says that a capacitor absorbs zero real power and negative reactive power (or delivers positive reactive power), is it (a) False (b) True C. If one says that a (positive-valued) resistor absorbs (positive) real power and zero reactive power, is it (a) True (b) FalseA single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)1.1 We have two loads in delta and another in star in parallel, the impedances of the branches of the delta are equal and we have that RΔ=1p.u. and XΔ=0.75 p.u., while in the star we have equal values of the branches, but formed by admittances where we have the conductance in parallel GY=0.64 p.u. and inductive susceptance of BY=-j0.48 p.u. If the loads are being supplied by a positive sequence balanced three-phase source with line-to-line voltage of phases a and b of Vab=1∠ 30º, if the base values are line-to-line base voltage of 1kV and three-phase base power of 100kW. DetermineA) Line and phase voltages, line and phase currents of the load in delta, line and phase voltages of the star, line and phase currents of the star.B) Obtain separately the phasor diagram of the delta and star load with the values obtained in A), indicate on the scale that these are 1 p.u.=5cm for example.C) obtain the power triangle and the power factor separately for each load. D) Obtain the power…
- A circuit is constructed with an AC generator, a resistor, capacitor and inductor as shown. The generator voltage varies in time as ε = Va - Vb = εmsinωt, where εm = 120 V and ω = 429 radians/second. The values for the remaining circuit components are: R = 61 Ω, C = 426 μF. The value for L is unkown. What is known is that the voltage across the generator leads the current in the circuit by φ = 48 degrees. 1) What is t1, the first time after t = 0 when the magnitude of the voltage across the inductor is maximum? 4) What is VL,max, the magnitude of the maximum voltage across the inductor? 5) What is VL = Vb - Vc, the voltage across the inductor, at time t = 0? Note that VL is a signed number.In the circuit in the figure, there is a load formed by connecting the resistor R0 between the terminals a and b and the inductance L0 in series. The amplitude of the voltage Vs (t) is √2 150 volts, the phase angle θs = 0 degrees, the period is T = 200π microseconds. Since R = 300OHM and C = 1 microF a) If the load phase angle is constant θL = 60 degrees, find the values of R0 and L0 that enable the load to draw the maximum average power from the circuit. b) Calculate the average power on the load.In the circuit in the figure, there is a load formed by connecting the resistor R0 between the terminals a and b and the inductance L0 in series. The amplitude of the voltage Vs (t) is √2 150 volts, the phase angle θs = 0 degrees, the period is T = 200π microseconds. Since R = 300OHM and C = 1 microFa) If the load phase angle is constant θL = 60 degrees, find the values of R0 and L0 that enable the load to draw the maximum average power from the circuit.b) Calculate the average power on the load.
- chapter 1 Q1 The rms value the AC input voltage to the of Circuit shown is 230U, and the firing angle is maintained Current is 5 A. constant at 45° so that the load a) Calculate the de output voltage. b) Assume that the load resistance remains the a same, find the current is a FWD is used at the output. c) If^ prime prime ScR^ prime prime " is open circuited, find load voltage and current a is the Same) (FWD is still connected and high. "L Load Ans[146.4U,6.03A ; 3.c2A] 3 3 FWD1- When connected in series with a pure resistor R with resistance r and inductance L, three pairs of currents are 5A with a sinusoidal voltage application with an effective value of 100V. The voltage across the coil and resistor element is 80V and 30V. a-Find the power and power consumed by the coil alone? b- Find the power consumed by the system and the power factor? c- Draw the voltage triangle, impedance triangle and power triangle?In the circuit shown in the figure, there is a load between the terminals a and b, consisting of the series connection of the resistor R0 and the inductance L0. The amplitude of the voltage Vs (t) is two root hundred and fifty phase angle Qs = zero degree period T = 200 PI microseconds. Since R = 300 ohms C = 1 nano F. a) Find the values of R0 and L0 that enable the load to draw maximum average power from the circuit b) Calculate the complex power on the load.
- You are given five light bulbs designed to operate on 160 mA current at 3.0 V (rms values), arid want to connect them in parallel, through an ideal transformer, to 120 V rms AC household power. a) Draw a circuit diagram showing the AC power source (a generator symbol ), the transformer, and resistors for the light bulbs. b) Is the required transformer step-up or step-down? What turns ratio N5/N is needed? e) Calculate the ruts current through both the primary and secondary coils of the trans former, in mA.(a) Calculate the equivalent impedance of the circuit given below, if the source voltage is v(t) = 60cos1000t (b) Calculate the source current flowing in the circuit (c) Draw the phasor diagram of the current and input voltageWhen it is connected in series with a pure resistor R with resistance r and inductance L, the current it draws with a sinusoidal voltage application with an effective value of 100V is 5A. The voltage across the coil and resistor element is 80V and 30V. a-Find the power and power factor consumed by the coil alone? b- Find the power consumed by the system and the power factor? c- Draw the voltage triangle, impedance triangle and power triangle?