In the shown circuit if the currents i, (t) = 15 cos (20t-45°) mA and i2(t) 8 sin (2001+30°) mA, the total energy stored in system at t = 0 is: k=0.8 5 H Comm 1.25 H U₂ O
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- 7. In a pure inductive circuit, the phase angle between the voltage waveform and current waveform will havephase shift * 180 deg O deg 45 deg O 90 deg 8. Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage? * Voltage is a measure of electric potential difference between two electrical points. O It's an electrical cliche. The other point could be negative or positive. None of the above.If an electrical circuit draws 100W + J100VAR from a sinusoidal source, then what would the circuit be? Explain why. a) a pure resistor circuit b) a series or parallel R-L circuit c) a series or parallel R-C circuit d) a series L-C circuitA current of i = 5 + 10 sin 377t + 377t Ampere flows through a series circuit containing resistance of 5 ohms and an inductance of 13.26mH. Determine the expression of the total voltage. a. e=25+70.7 sin (377t + 45°) Volts O b. e 25+ 70.7 sin (377t - 45°) Volts = O c. e = 25 + 70.7 sin (377t – 30°) Volts O d. e 25+ 70.7 sin (377t +30°) Volts
- 7. Defer to circuit shown below, Determine the current I. And solve for the potential difference: (a)Vaf (b) Vie (c) Vah (d) Vnf a b | 20v 20 |24V 42 I 2V 78 i 3V 12 32 5V, h gThe sinusoidal voltage source in the circuit seen in (Figure 1) is operating at a frequency of 46 krad/s. The coefficient of coupling is adjusted until the peak amplitude of 1 is maximum. Figure 2002 100 Q 5 mH3 7502 300 £2 ww 20 mH 1 of 1 40 nF Part A What is the value of k? Express your answer using three significant figures. k = .085 Submit Part B VAΣ vec X Incorrect; Try Again; 28 attempts remaining i₁ = Submit Previous Answers Request Answer What is the peak amplitude of 1 if Ug = 399 cos(4.6 x 10¹) V? Express your answer to three significant figures and include the appropriate units. Provide Feedback μA Value Request Answer Units ? ?A series resistance - capacitance ( R-C ) circuit is connected to a 230V, 60 - cycle source. If the power taken by the circuit is 4, 800W and the voltage drop across the resistor is 115V.Calculate the capacitance of the capacitor. 600.36 microfarad 1,500.05 microfarad 556.096 microfarad 250.94 microfarad
- The sinusoidal voltage source in the circuit seen in (Figure 1) is operating at a frequency of 54 krad/skrad/s. The coefficient of coupling is adjusted until the peak amplitude of i1 is maximum. What is the peak amplitude of i1 if vg=429cos(5.4×104t)V?5) Find the reactance the inductance and impedance of the circuit. Calculate the current of this circuit and the sketch waveform of current and voltage. V1 10 V 60 Hz R1 m 100kQ 12 Vrms 1000 Hz 0° 6) Find the reactance the inductance and impedance of the circuit. Calculate the currents of this circuit R www 502 L L1 106mH eee 10 mHPower factor 90 to 100% 88 to <90% 85 to <88% 80 to <85% 75 to < 80% 70 to < 75% 65 to < 70% 60 to <65% 55 to <60% 50 to <55% Less than 50% Surcharge None 2% 4% 9% 16% 24% 34% 44% 57% 72% 80% Use the table given for the following. A house with inductive loads has an avg consumption of 40kW and 26kVAR is supplied 230 Vrms source. We want to make the surcharge 0% by adding a capacitor. a. What is the smallest kVar of the capacitor that would reduce the surcharge to 0%?
- Given V 20 sin(@t + 60°) and V2 = 60 cos(ot- 10°). What is the phase angle %3D between the waveforms? All terms to be expressed in cosine terms. 60 80 20 40 Moving to another question will save this response. a hp O O O11 Consider the following circuit used to provide power for an inductive RL load. The input voltage is Vs=150V and the load has a 30 impedance value. The thyristor is working at a frequency fs = 2 kHz. The discharge current is to be limited to 50A and the required dv/dt is 50V/us. If the value of Cs is equal to 0.158µF, then the snubber losses are equal to: put of question T: T R Vs Select one: O a. 4.56W O b. 2.56W Oc. 5.45W Od. 3.56WTake eo=1.6×10-19JV, k=1.381×10-23JK Question 4: A solar cell (photovoltaic cell) has an open circuit voltage value of 0.5 V with a reverse saturation current density of J0=1.9×10-9Am2. The temperature of the cell is 25℃, the load voltage is 0.55 V. The solar irradiation is 900 Wm2, determine (a) The current output density, Js. (b) The current output density, Js if we were to find the maximum power condition at the load voltage. (c) The power output of the cell per unit area considering this load voltage 0.55 V, and the current output density of (b), and (d) The efficiency of the solar cell.