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- a) What is the time domain expression for the current? b) If the load impendance is created by an inductor with value L=375 mH, find the phaser voltage Vx? c) If the load impendance is created by a capacitor with value C=16.7 uF, find the phaser voltage Vx?Show that at a given frequency ω, the circuits will have the same impedance between the terminals a,b ifR1=R21+ω2R22C22,C1=1+ω2R22C22ω2R22C2.2. Find the values of resistance and capacitance that when connectedin series will have the same impedance at 40 krad/s as that of a1000 Ω resistor connected in parallel with a 50 nF capacitor.The total impedance Z, of a circuit containung an inductor with inductance L and resistance R in series is given by Z R j2fL where f frequency . If Z (50 j200)ohm and f = 50Hz. Find R and L
- An RLC circuit (has resistance and reactive elements) supplied by a 60Hz power source is found to have a lagging power factor (PF). What can you say about the relative contributions of the resistance (R), XL inductance, XC capacitance & resistance/reactance (ratio) utilized in this circuit at the 60Hz frequency? (min two statements – major reactive element & comparison to Resistive element)A patient is coupled by 5pF stray capacitance to a 220V 50Hz ac power-line bus while his body is insulated from ground. The resistance experienced from the right side of the circuit, Za is measured to be 4MΩ.Find the voltage, Vo(t) and the voltage, Io(t) by usingphasor techniques.Exercise 11) Transform the circuit in phasor domain representation2) Determine the value of total impedance, ZT3) Determine the value of total current, IT4) Determine the value of voltage across resistor and capacitor5) Convert in rms values.
- The capacitor of external defibrillator must be loaded at 1500V, in order to generate a two-phase wave of 150 J.Considering a transthoracic impedance is 80ohms and a capacitance of 30 000 uF. 3- What is the energy of the capacitor?4- What is the internal impedance of the defibrillator in the previous cases?2.1 An ESKOM engineer made the following recommendation for 220 V, 50Hz line. 150µF capacitor and a 75 mH inductor for the TCR to correct the power factor to be at unity. What is the delay angle when the load current has a reactive component of -j9 A?The inductance and capacity values used in a transmission path are 20 mH and 60 nF, respectively. Accordingly, find the significant impedance value that will eliminate the delay time per sector of this transmission path and the reflections at its output.
- The resistance and inductance of a coil can be obtained by connecting the coil in series with a known resistance R and measuring the coil voltage Vcoil, the resistor voltage VR and the total voltage V. The frequency must also be known, but the phase angles of the voltages are not known. Given that f = 60Hz , R = 10 ohm Vcoil = 22.4 V. VR = 20 V and v = 36v , find the resistance and inductance of the coil.1. For the following sinusoids, determine which one leads and by how much a. ?(?) = 10cos (4? − 60°) and ?(?) = 6sin (4? + 50°)b. ?ଵ(?) = 4cos (377? + 10°) and ?ଶ(?) = −20cos(377?)c. ?(?) = 13 cos(2?) + 5 sin(2?) and ?(?) = 15cos (2? − 11.8°)the total inductance ??? for the given network below.