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The magnetic field produced in the air gap of an induction motor by the stator windings is given by B=Bm cos(wt-2theta) in which theta is angular displacement in the counterclockwise direction as illustrated. how many poles does this machine have? given that the frequency of the source is 50 Hz, determine the speed of rotation of the field. does the field rotate clockwise or counterclockwise?
Analyzing the Blink Alive code - Embedded Systems Design
Silicon at T = 300 K is doped with arsenic atoms such that the concentration of electrons is n0 = 7 x 1015 cm -3. (a) Find Ec - EF. (b) Determine EF - Ev. (c) Calculate p0. (d) Which carrier is the minority carrier
A 20-Hp, 240VDC, 4-pole Shunt motor operates at rated load and 1700rpm and an efficiency of 88%. It has armature resistance of 0.2Ω and field resistance of 240Ω. Find: a)Power input to the motor b)IFLA of the motor
Two batteries with 1.8 voltage and 10.5 Ohm internal resistance each are connected in series. This battery pack is used to boot a small electric motor with 275 Ohm resistance. Find the power delivered to the motor.
Open Neutral Assume that the load is star connected with the neutral disconnected. Each phase has a series RL load with R = 5 ohms and L = 20 mH. Plot the neutral voltage Plot the phase to neutral voltage for phase a.
Power Systems Theory Definitions and Formulas, Define, (a) The fault level of a system or unit in a system, (b) base MVA
A window is etched through a 500 nm thick oxide on a [100] silicon wafer. The wafer is re-oxidized at 1100 °C using wet oxidation to grow a 750 nm thick film inside the window. Draw a cross-section of the wafer following the second oxidation.
All the script needs to do is make a two 10 by 10 grids, one for the user, one for the computer. Allow the user to choose where to place their ships, and in which direction. Then have the computer randomly place its ships.
If I created a file name Budget Analysis 2005.html, what would be the short name generated by Windows?
A DSP system has a sampling frequency of 800 HZ. What is the maximum frequency of the analog signal so that the aliasing would not occur
Consider a 6 cm2 dye sensitised solar cell with reverse saturation current Jr=10-10A/cm2. When the solar irradiance is 1,000 W/m2, it produces an equivalent photo current/short circuit current of 15 mA/cm2 at 300 K.
A jet engine is modeled as a serial combination of a compressor, an adiabatic constant pressure combustor, and a turbine. Air (considered to have a variable specific heat) is compressed through a compression pressure ratio of 8.25:1
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