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A three phase abc sequence wye connected source with Van=220<0degrees Vrms supplies power to a wye connected load that consumes 50 kW of power in each phase at a pf of .8 lagging. Three capacitors are found that each have an impedance of -j2.0, and they are connected in parallel with the load in a wye configuration. Determine the power factor of the combined load as seen by the source.
The flat circular disk rotates about a vertical axis through O with a slowly increasing angular velocity ?. Prior to rotation, each of the 0.44-kg sliding blocks has the position x = 22 mm with no force in its attached spring.
Electrons in silicon carbide have a mobility of 1000 cm^2/V-sec. At what value of the electric field do the electrons reach a velocity of 3 X 10^7 cm/s Assume that the movility is constant and independent of the elctric field.
What device can be used to connect to data bus with enable/disable capability. When all these kind of devices tied to the bus are disabled, what logic level is on the bus line.
Calculate the converter voltage VC1, reactive power, the converter phase current and modulation index.
Plotting Continuous time signal, Consider the following continuous signal: x(t) = 10e^-3t u(t) Using Matlab, plot the continuous-time signal over the range -1=
a. Determine the frequency and the period of x(t) b. Given another signal, y(t)= sin(3/4(t+1)+3/8), is y(t) identical to x(t) Why c. Given a discrete time signal x[n] = cos(3/4(n+1/2)+1/4) is it periodic Why
A video signal contains light variations that change at a frequency as high as 3.5 MHz. What is the minimum sampling frequency for A/D conversion?
Assume that the channels between the transmit antenna and the receive antennas are statistically independent Rayleigh fading channels and the MRC combination is used at the receiver. Given that the system BER is 10^-2 when the mean SNR is 3dB.
In a 120V compound generator, the resistances of the armature shunt and series windings are 0.06 ohm, 25 Ohm, and 0.04 Ohm respectively. The load current is 100A at 120V, find the induced EMF and the armature current of the generator.
An automobile battery is charged with a constant current of3.75A for5hours. The terminal voltage of the battery isv= 11 + 0.5tVfort> 0, wheretis in hours.(a) Find the energy delivered to the battery during the5hours
what is the perceived colour if you mix red ,green and blue dyes in equal proportion and why What about red and green frequiencies only
The fermi energy level for a particular T = 300K is 6.25 eV. The electrons in this material follow the Fermi-Dirac distribution function. (a) Find the probability of an energy level at 6.50 eV being occupied by an electron.
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