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For the Y-Y circuit in Practice Prob. 12.2, calculate the complex power at the source and at the load.
Practice Prob. 12.2
A Y-connected balanced three-phase generator with an impedance of 0.4+j0.3 Ω per phase is connected to a Y-connected balanced load with an impedance of 24 + j19 Ω per phase .The line joining the generator and the load has an impedance of 0.6 + j0.7 Ω per phase. Assuming a positive sequence for the source voltages and that
, find:
(a) the line voltages,
(b) the line currents.
Indicate the closest value to the change in decibels of the received signal for the given parameter change. The distance between transmitter and receiver for a one-way communication path is halved.
A 120 kVA transformer is to be parallelled to a 60 kVA transformer. Each transformer has rated voltages of 10kV-120V at 60Hz. When supplying a 250A load at 0.85 PF, what is the total input current and power factor if the output terminal voltage is 12..
A power supply outputs 25Winto a load. The power supply input voltage is 115V and the inputcurrent is 0.5A. What is the effiecency of the power supply
Two infinitely long coaxial cylinders ofradii a and b ( a > b) carry surface charge+ λ and -λ respectively. Find the E field in theregion inside the inner cylinder, between the cylinders, andoutside the cylinders.
Consider a five bit Johnsoncounter, initialized to "00000", provide the complete table for Sequence of states of the counter dissipation of the flip-flops
Explain why the short-circuit method for determining the Thevenin resistance of a circuit cannot be applied if the circuit does not contain any independent current or voltage sources.
Draw energy band diagrams, for k lying between 0 and pi/a (take a=5Ã), for a material whose valence band follows the equation. and calculate the effective masses for conduction and valence bands.
A 100µF capacitance is connected in parallel with the series combination of 10-mH inductance and a 1 ohm resistance. Calculate the impedance of the combination in polar form for angular frequencies of 500, and 1000 radians per second?
Given a 1-phase 50 kVA 12.47 kV pf = 0.8 lagging static load a. Modeling the load as constant complex power, determine the correct value for S and I. b. Modeling the load as constant complex impedance, determine the correct value for Z and I.
a)How large a parallel resistor Ra mustbe placed in parallel with the D'Arsonval meter movement toextend its useful measuring range to 1A b)For the design completed in Prob. a determine themeasured current that flows when the D'Arsonval metermove..
A 64K x 16 RAM chip uses coincident decoding by splitting theinternal decoder into row select and column select. (a) Assumingthat the RAM cell array is square, what is the size of eachdecoder, and how many AND gates are required for decoding an ad..
A point charge of +Q is placed at the center of a square and asecond point charge of -Q is placed at the upper left corner. It isobserved that an electrostatic force of 2.0 N acts on the positivecharge at the center.
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