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gear box has ratio 8:1 to the .9-m diameter wheels. ARMATURE HAS SOURCE WHERE THE VOLTAGE CAN BE VARIED FROM 0 TO600--IGNORE ALL LOSSES.A) DETERMINED REQUIRED VALUE OF kφ to give a speedof 12.5 m/s at an armature V of 600Volts.b) with k from (a) whats the armaturecurrent to provide athrust of 8 kN?c) the speed range above 12.5 m/s is provided by fieldweakening with constant arm voltage of 600V. whats the requiredvalue of kφ at a speed of 25 m/s?
Shuffle a deck of cards and pick two cards at random. Observe the sequence of the two cards in the order in which they were chosen. (a) How many outcomes are in the sample space (b) How many outcomes are in the event that the two cards are the same ..
Identify the types of system-building methods used by Dorfman to build its wireless warehouse system.
A point charge is placed at the origin of the spherical system of coordinates. a) Calculate the total energy stored in the space between R=a and R=b (b>a); b) What is the energy stored between R=b and R=5b
1. Determine the peak-to-peak current ripple in the output inductor for a forward converter and determine the output voltage ripple of the converter. We know the following parameters: duty cycle d, input voltage Vin, turn ratio.
Give the circuit that adds two BCD numbers and gives out a BCD number. The input BCD numbers should be of two digits and the output BCD number should be of 3 digits. Explain the algorithm for the addition of BCD numbers.
A transmission line segment with Zo=50 Ohms and of length l is terminated at a load resistance of RL that can be varied. Sketch the input impedance Zin as a function of RL if l=(wavelength/4)
Find the electric field intensity E, at (ρ=0,φ=a, z=h) due to a uniformly charged line of line charge density of ρLC/m and radius a lying inthe xy plane at z=0.
A synchronous generator rated 1350 MVA at 0.9 pf, 22.5-kV, Xs=11.6% is connected to a power system through a 1500 MVA, 7.9% 24-kV/230-kV generator step up transformer. The power is generated into a 230-kV system.
If it is known that an electric dipole is located at the origin andthat its E-field at the point P(2[m], 30°, 90°) isE=4âθ[V/m],find the magnitude and direction of the dipole moment p.
(A)Under equilibrium conditions and T= 0 Kelvin ,what isthe probability of an electron state being occupied if it is located at the Fermi level (B) If Ef is positioned at Ec,determine(numerical answer required) the probability of findingelectrons in..
Design a full wave unregulated dc power supply having an input of 220 V rms 60 Hz and an output voltage maximum of 19.5 V and a minimum of 15 V. This power supply will be needed to provide power to a load which requires a maximum current
Your office has emailed you a service request from one of your regular customers. The office has included all the information it had recieved from the homeowner. it seems they recently planted new shrubs in their yard.
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