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a) If the excitation voltage E0 is equal to the terminla voltage ( 4kV ), what is the maximum real power which the motor can deliver without losing synchronism ?
b) What is the rotor pole shift in electrical degrees, corresponding to the nominal load of 2000kW ?
The forward-bias current in a GaAs pn-junction at T = 300 K is ID = 15 mA. The reverse-saturation current is IS = 10^-19 A. Determine the required forward-bias diode voltage.
How does this cost compare with the current cost of new coal figured generation at 3.5¢/kWh? Write a brief (400 words or less) argument on why Colorado should or should not shut down its coal power plants and replace them with wind farms?
By direct integration find the Laplace transforms and the region of convergence of the following functions
Consider unsteady diffusion across a membrane of thickness L. Initially, the concentration of solute in the membrane is zero. At time zero, the concentration at x=0 is raised to C0 and the concentration at x=L is maintained at zero.
For a mixture of ethane 60%, acetylene 20%, and benzene 20% total mass of 250 kg is loaded into a reactor obeying the Carnot cycle, we want to know which produces more work when reacted with 25% fuel, 60% O2, 15% CO2 for 30 cycles.
A signal is modulated by BPSK and transmitted over an AWGN channel. At the receiver, the bit error rate performance is 0.001
Using the LM555 data sheet, make an estimate of the maximum fundamental operating frequency in the astable mode.
Assume that we will use a double-precision number for non-integer numbers (if you recall, this means a binary "scientific notation" with a sign bit, 11 exponent bits using an excess-1024 representation, and a 53-bit mantissa of the form 1.--52 bits-..
Analysing harmonic content of ac voltage waveforms, An a.c. voltage, V, comprises of a fundamental voltage of 100 V rms at a frequency of 120 Hz, a 3rd harmonic which is 20% of the fundamental
An ADSL signal uses 250 channels, each of 4 kHz bandwidth. Assume the maximum signaling rate to be 1 symbol/Hz. QAM is used within each channel with up to 64 point constellations. What is the bit rate/channel
(c) Use a single 4-to-1 multiplexer with an active low enable and an active high output and a minimum of additional gates. Show the function expansion both algebraically and on a Karnaugh map.
(a) Determine free electron and hole concentration.(b) Calculate the effective density of states at valence band, Nv. Given that ni = 1x1010 cm3 and kT = 0.026.
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