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A 10-hp, 230-volt shunt-wound motor has rated speed of 1,000 rev/min and full-load efficiency of 86 percent. Armature circuit resistance is 0.26 Ω; field-circuit resistance is 225 Ω. If this motor is operating under rated load and the field flux is very quickly reduced to 50 percent of its normal value, what will be the effect upon counter emf, armature current and torque? What effect will this change have upon the operation of the motor, and what will be its speed when stable operating conditions have been regained?
How to solve : synchronous motor connted to infinite bus over short feeder with purely reactive impedance. Drawin P' - Delt ' characteristics showing A1 and A2 areas.
Slots in the broad wall of a rectangular waveguide scatter power symmetrically, so that they can be modeled as a shunt admittance,Y, in a transmission line. Consider the waveguide structure below, with four equally space slots .68 lambda apart
Write the logic equation for Y in terms of A,B,C that solves this problem, and draw the gate-level diagram.
Research about origin, formation process, and age of oil. What type of biota contributed to oil formation How is that linked to marine environment being conducive to oil formation What are the prospects for offshore oil beds
A monatomic idealgas (y = 5/3) that is initially at a volume of 0.08 m3 is compressed adiabatically to a volume of 0.04 m3. What is the ratio of the finaltemperature of the gas to its initial temperature
A parallel circuit consists of a source and 15 ohm and 30 ohm resistors. The resistor of 15ohm draws a current of 8A. a) Find the current out of the current source. b) Find the current through the 30 ohm resistor.
Compare the three rectifier ( half wave, full wave and bridge rectifier) to design a 20 V supply with 1V ripple for a 1Kiloohms load. In the comparison look for the filter capacitor, transformer turn ratio n and the PIV of the diodes.
Construct a ladder schematic with a holding circuit to energize a relay. The relay when enerigized will turn one of and turn a different lamp on.
The ciruit assumesthat the input terminals have the complements of the G's, the P's,and of C1. Derive the boolean functions for the look-ahead carries C2, C3, and C4in this IC. (Hint: Use the equation-substitution method to derivethe carries in te..
Design and development department associated with a power generation plant has various issues which require resolving. You are now asked to provide a series of written solutions on the analysis.
A "ferrite" having a relative permeability of 50 H / m, that operates with flux densities sufficiently small, may be considered a single material. If the magnetic flux density in the material is B = 0.05 T, H and M. halle How to compare the values
The acceleration of a particle is defined by the relation a = -k/x . It has been experimentally determined that v = 15 ft/s when x = 0.6 ft and that v = 9 ft/s when x = 1.2 ft. determine (a) the velocity of the particle when x = 1.5 ft
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