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1. A 6-pole, wave-connected dc armature has 300 conductors and runs at 1200 rpm. The emf generated is 600 V. Find the useful flux/pole.
2. A 4-pole, dc machine has a lap-connected armature having 60 slots and eight conductors per slot. The flux per pole is 30 mWb. If the armature is rotated at 1000 rpm, find the emf available across the armature terminals. Also calculate the frequency of emf in the armature coils.
Define the MATLAB vectors x and y to represent the input on the interval -5
Three steel plates are welded together to form the beam shown. Knowing that the allowable normal stress for the steel used is 22 ksi, determine the minimum flange width b that can be used.
A particular inverting amplifier with nominal gain of -100 V/V uses an imperfect op amp in conjunction with 100-k ohm and 10-M ohm resistors. The output voltage is found to be +9.31 V when measured with the input open and +9.09 V with the input gro..
A U.S Department of Energy report estimates that over 100billion kWH/year can be saved in the United States by variousenergy conservation techniques applied to the pump-driven systems.
1- Find the voltage across the inductor for t > 0 2- Sketch the voltage and the current as a function of time 3- Find the power ( in microwatts) at the terminals of the inductor when t = 200 ms
Compute the operating torque angle δss. Assume δss = 25 degrees and computer areas A1 and A2
Suppose the z=0 plane carries a sheet current K=5. A/m x. Then a 1 m long rod exists above the current sheet and has velocity u. Find the Vemf when the rod is parallel with the x-axis, u= 2(m/s) y.
The requirements for the frequency resolution of the system specify that the largest allowable main lobe for the Kaiser window is π/100. What is the best side-lobe attenuation expected under these constraints?
What is the maximum number of DECIMAL digits that can be generated with this choice of N (ie. the maximum length of the sequence of decimal numbers that could be generated with this choice of N, before any number repeats itself)
Try to develop a circuit such as that used for the representation of signals in Illustration 38 - transition from a line spectrum to a continuous spectrum. Only the frequency, not the pulse length should be variable.
A 60-turn coil carries a current of 2A and lies in the plane x + 2y- 5z = 12 such that the magnetic moment m of the coil is directed away from the origin. Calculate m, assuming that the area of the coil is 8cm2.
Recall that for discrete sequences the ts sample period (the time period between samples) is the reciprocal of the sample frequency fs. Write the equations, describing time-domain sequences for unity-amplitude cosine waves
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