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Modern electrical machines are based on the interactions of two rotating magnetic fields. Could we design a machine based on the interactions of rotating electric fields?
If so, draw a possible three phase motor that is based on two rotating electric fields and explain 1) the basic principle; 2) the drawback of the electric field based machine when it is compared to magnetic field based machines
Design a bandpass filter of 'Sallen and Key' topology and having the following characteristics fo = 3.3 kHz, Q = 2.2
Draw the ROM truth table for the seven segment
A Si sample is uniformly doped with phosphorus at 5 E 16 cm^-3. We make a p-n junction by implanting boron atoms into the surface layer. The implanted depth is 0.15 µm. What should the surface concentration of the boron implant
A 60-Hz, single-phase transmission line has a length of 80 miles. Its shunt conductance (G) is 3.4×10?11 S/mile, resistance (R) is 0.1 ?/mile, capacitance (C) is 16 pF/mile, and inductance (L) is 0.56 mH/mile 220 kV, 220 MVA with power factor
A firefighter of mass 85 kg slides down a ver tical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10 m/s2 . What is the friction force that acts on him
Write a program that reads a file containing only integer, but some of the integers have embedded commas, as in 145,020. The program should copy the information to a new file, removing any commas from the information.
If it takes 1 sec to rotate 45 degrees after starting from rest, how long in seconds would it take to instead rotate 81 degrees after starting from rest under the same constant angular acceleration.
trace how the electrons and holes move through the device under the two different biasing conditions. Explain how these three devices work in terms of holes and electrons.
(a)using 4 rectangles find the area of the region bounded by f(x)=x^2 +1, the axis from x=0 to x=2,(b) solve part (a) using n rectangles and the limit process as n -> infinity.
The instantaneous power p into a one port containing resistors and inductors has maximum value 100(1+sqrt2) W and minimum value 100(1-sqrt2)W. (note that instantaneous power is measured in W, and it contains various contributions
Determine the location of the peaks in the following sampled spectrum for the following sine waves: (a.) signal frequency = 300 Hz; sampling frequency = 1 kHz (b.) signal frequency = 600 Hz ; sampling frequency = 1 kHz
A unit for a telecommunications system is to be designed so as to have a minimum availability of 0.9994. The MTTR (mean time to repair) for the unit is estimated to be 24 hours.
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