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A 3-phase , 4 wires balanced supply with BCA phase sequence issupplying the following loads connected in each phase:Phase A:20kVA at 0.8 power factor laging.Phase B:10kVA at 0.8 power factor leading.Phase C:10kVA at unity power factor.Find the line currents, load impedance connected in each phase andthe overall power factor of the system. Given that VAB =20.8kV(angle -30).
Assume the average energy density of sunlight to be 800 w/m^2 ---and the overall photovolatic system efficiency to be 10 percent. Calculate the land area covered with photovolatic cells needed to produce 1000 Mw , the size of a typical large centr..
Determine the value of the constant c such that the following functions are valid probability functions: A. p(x) = cx/20, x = 1,2,3,4,5,6 and zero elswhere. B. p(x) = c(X^2 + 1), x = 1,2,3,4,5, and zero elsewhere.
A three phase motor is connected to a 60Hz electrical source. The motor spins at 600rpm. Find the number of poles in the machine. The output of the above motor is connected to the input of a generator.
What does the following code do. class MyListener implements ActionListener public void actionPerformed (ActionEvent e) MyListener listener = new MyListener Timer t = new Timer(interval, listener)
An ideal C/D converter is followed by a discrete-time LPF which is followed by an ideal D/C converter. The sampling rate is 8000 samples per second. The input analog signal is bandlimited to 3900 Hz. The overall frequency response is required to s..
A sequential circuit hast two inputs (X1 and X2) and one output (Z). The output begins as 0 and remains a constant value unless one of the following inputs sequences occur: (a) The input sequence X1X2 =01,00 causes the output to become 0
An ideal n+/p diode has only the quasi neutral p region of length L illuminated with light such that GL electrons/cm3-s are generated uniformly throughout the region. There is no photo-generation occurring elsewhere in the diode. Derive the curren..
If the power of a 500-kHz transmitter is increased from 150 W to 300 W, what would be the percentage change in field intensity at a given distance from the transmitter. What would be the decibel change in field intensity.
Design an analog divider circuit with a minimum number of op amps with Vo = f(V1/V2) where V1 and V2 are inputs of the circuit and Vo is the output and derive Vo in terms of V1 and V2 and the circuit elements.
The doping level of N-type semiconductor is Nd= 5^19 cm^-3. Determine the room tempature position of the Fermi level ( with respect to the bottom of the comduction band) if the semiconductor is A). Si (Nc=2.86^19cm^-3)
Given a buck-boost converter (with ideal components): 8 V. Vin 40 V.; Vo = 15 V. (regulated); C = 470 micro Farads; and fs = 20 KHz. (a) Determine minimum L to ensure CCM operating mode if Po 2 W.;
A uniform plane E field, polarized in the x direction travels in the negative y direction in dry earth (Er = 16, Mu(r) = 1) with a phase constant Beta = pi rad/m and an amplitude of 4.0 A/m. If this field has its maximum value at t = 0, y = 2
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