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Calculate the approximate diameter and length of stator core, the number of stator slots and the number of conductors for a 20KW,400V,3 phase,4pole,1200rpm,delta connected induction motor. Bav=0.5T, Kw=0.82, ac=26000amp.cond/m, power factor=0.8L/=1,double layer stator winding.
Determine the reservation table
(a) Using an allowable stress of 120 MPa, determine the largest couple M that can be applied to a beam of the cross section shown. (b) Solve part a, assuming that the cross section of the beam is an 80-mm square
Design a FIR linear phase filter by approximating the ideal frequency reponse (H^{d}(e^{jwt})=1, for |w|
An amplifier produces an output voltage of 2v for an input of 50mv.- If the input and output currents in this condition are 4mA and 200mA, determine the voltage gain.
Mark on the diagram, the magnitudes and relative directions of the currents in the winding as well as in the input and output lines when delivering the rated kVA to load.
what are two fundamental advances in the circuit theory that were developed in the 19th century in response to the challenges of telegraphy?
Calculate the length required for a 50% coupling when the gap is 7 μD.
Calculate the lowest 3 energy levels in a quantum well made from InAs, using the infinite potential approximation. Length of the well L = 10 nm.
Determine the rms values of the voltages VR and VL and the current I. - Plot vR, vL, and i versus time on separate plots.
A shunt DC generator has a termianl voltage duringopen-circuit of 127V. When the machine is operating at rated load,the rated terminal voltage is 120V. Find the load current ifthe field resistance is 15 ohms and the armature resistance is 0.02ohms..
Because of the commutation problem, the field flux can be reduced down to one-third of the rated value. It is assumed that the field flux is proportional to the field current.
The magnitude of the current in a RL circuit decreases at a rate of 2000 A/s at t=0 and 100 A/s at t=.2s. At what time has the energy stored in the inductor decreased 1 percent of its intial value.
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