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A 20 kW, 500 V shunt motor has an efficiency of 90% at full load. The armature copperloss is 40% of the full-load loss. The field resistance is 250 Ω. Calculate the resistance values of a 4-section starter suitable for this motor in the following two cases:
An article in the Wall Street Journal commented that despite Perry's remarks: " Bernanke is willing to embrace the political independence embedded in his role to do what Fed officials think the economy needs." How is "political independence" embed..
1. Compare a script tool such as Matlab to a block tool like Simulink and how you can use them efficiently. 2. Convert the designed prototype filter to highpass filter with cutoff frequency f_C=10,000 Hz.
Design a tunk circuit with resonant frequency of 10 kHz and bw of 500 Hz. show your design equation, then use a circuit simulator package to prove your design is correct. you must attach both your design calculation and computer output.
Each phase of the load consists of an impedance of 30 + j40 ohms. Find the line to neutral voltage phasors, the line to line voltage phasors , the power and the reactive power delivered to the load. Assume that the phase of Van is zero.
Find the operating point ofeach diode to at least four significant figures using the iterativemethod and the value Vt = 25mV. This problem is more difficult thanthose presented in the text because the iteration must proceed over three elements
The propagation law follows the free space up to a distance ofdbreak = 50 meters, and for larger distances the receive power is similar to(d/dbreak)-4.2. Transmit antenna gain is -7dB; the receive antenna gain is 9 dB. Compute the available fadi..
why sinusoidal wave is chosen for AC fundamentals rather than a simple curve such as square or triangular wave?
i- the current distribution along the antenna , and the radiated power . ii- if the sorce is now replaced by another with frequency = 300 MHz , find the new current distribution and the radiated power assuming that the input current remains .5 Amp..
Compute z in decibels required to give PE = 10-7 for noncoherent, binary FSK and for DPSK. For the latter, carry out the computation for both the optimum and suboptimum detectors.
If both batteries are operating in parallel, they have an individual failure rate of 0.1 per year. If one fails, the other can operate the transceiver (at a reduced power output). However, the increased electrical demand will triple the failure ra..
i want to know the working of amplifiertba810. and explain each pin function in it.and specify its power rating and
mesh analysis involves writing and solving a number of simultaneous equations. The number of equations is equal to the number of independent loops in the circuit. Each equation is derived from the application of KVL around the loop.
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