7. A source of 100 Volts rms is supplying a resistance 80 ohms in parallel with a 200mH inductor. To what angle is the current lag or lead? A. 46.7 deg. lag B. 43.3 deg. lag C. 46.7 deg. lead D. 43.3 deg. Lead 8. Two impedances Zı=2+j4 and Z2=R+j0, are connected in parallel. Determine R so that the pf of the circuit is 0.9 lagging. C. 2.4 ohms A. 3.2 ohms B 42 ohms D 64 ohnms

7. A source of 100 Volts rms is supplying a resistance 80 ohms in parallel with a 200mH inductor. To what angle is the current lag or lead? A. 46.7 deg. lag B. 43.3 deg. lag C. 46.7 deg. lead D. 43.3 deg. Lead 8. Two impedances Zı=2+j4 and Z2=R+j0, are connected in parallel. Determine R so that the pf of the circuit is 0.9 lagging. C. 2.4 ohms A. 3.2 ohms B 42 ohms D 64 ohnms

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.61P

See similar textbooks

Similar questions

The rms value of v(t)=Vmaxcos(t+) is given by a. Vmax b. Vmax/2 c. 2Vmax d. 2Vmax
write a report to compare between ac througe capactance and ac throughe in inductance then:for the cirucit shown beside, find the total impedance between a & b and cirucit current (I)
what is the reactive power absorbed by the load ZL in VAR? Assume source is in rms
1) Two identical voltage waveforms of difference phase angles are shown in Figure B. Write down the expression of waveforms A and B clearly. HUS Voltage (V) 8 0 K/N B 7: ST ot
Draw the sinusoidal waveform of the AC voltage and current for the given loads below. Describe the characteristics of the waveform for each load. A. Pure resistor B. Pure inductor C. Pure capacitor
For the phasor diagram in figure 6 express the voltages in sinusoids for a period of 5ms. Im Re )e,=45° e,=20 Vz=10 V2=8 Figure 7 a. Va(t)=. b. V2(t)=. c. What is the rms voltage of V1 = d. What is the rms voltage of V2=_ e. What is the frequency in Hz = f. What is the angular frequency =. In terms of lagging and leading what is the exact phase relationship between V, (t) and V2(t) g.
Shown in the figure below is an "RL" circuit drive by an AC power source. The AC power source has an RMS voltage of Vps (RMS) = 9.84 Volts and is running at a frequency of f = 8.585e+04 Hz. The resistor has a resistance of R = 2170 and the inductor has an inductance of L = 3.54e-03 Henries. Vps R ww Write the FORMULA for the total impedance of the circuit Ztot = Determine the numerical value of Ztot = 2890.5 Determine the numerical value of $z= = 41 Determine the current through the circuit: • I(PEAK) = 4.81E-3 • I(RMS) = 3.404E-3 Determine the voltage across the resistor: • VR(PEAK) = 7.387 • VR(RMS) = 5.22 ✔✔ Amps ✔Amps Write the FORMULA for the phase of the total impedance of the circuit z... = | tan-1 2701 R x Volts X Volts Determine the voltage across the inductor: • VL(PEAK) = 9.184 • VL(RMS) = 6.49 ✔ Volts Volts L R²+ WL- ✔ degrees 2 If a second circuit were connected in parallel with the inductor, this circuit would be considered as: O a low-pass filter O a capacitive switcher…
A generator rated at 30MVA, 11kV has a reactance of 40%. Calculate its p.u. reactances for a base of 50MVA and 10kV. O 0.606 p.u. O 0.506 p.u. O 0.806 p.u. O 0.706 p.u.
Use the information below to answer questions 24 und 25. The voltage across and the current through a load are (10+ j5Y and (2-jiArespecively. 24. What is the reactive power in VArconsumed? D. 0 A. 15 C. 20 D. 25 25. What is the pawer factor of the load? A. 0.8 leading B. 0.8 Jagging. -D. 0.6 ligging C 0.6 leading
A utility company plans to connect a total of 20uF of capacitance to a 7200 volt line. To make this connection four capacitors will be connected in series. What is the capacitance of each capacitor? Answer is 80uF. Now what is the minimum AC voltage rating of each capacitor?
In the figure: R1 = 1439.170, R2 = R1 and R3 =2R2, then determine the value of the voltage source E. a 8 mA 10 mA 2 mA RT R1 R2 R3 O 25.33 11.51 O 17.27 15.43 13.82 +
An alternating current varying sinusoidally with a freq. of 50 c/s. has a r.m.s. value of 35 A. Write down the equation for the instantaneous value and find this value at (i) 0.0035 sec. (ii) 0.0135 sec. after passing through a positive max. value.