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Q. A dc series motor operates at 750 r/min with a line current of 100 A from the 250-V mains. Its armature-circuit resistance is 0.15 and itsseries-field resistance is 0.1 . Assuming that the flux corresponding to a current of 25 A is 40% of that corresponding to a current of 100 A,determine the motor speed at a line current of 25 A at 250V.
A zener regulator consumes a zener diode with an internal zener resistance of 5 ohm and the value of resistance in the regulator circuit is 82 ohm. If the supply voltage alters by
part of dc machine
Analysis Flow Similar to most subjects, the analysis of semiconductor devices is also performed by starting from simpler problems and regularly progressing to more complex one
Q. From a three-phase, 60-Hz system, through a motor-generator set consisting of two directly coupled synchronous machines, electric power is supplied to a three-phase, 50-Hz syste
what is the time of short circuit ?
Inference Rules of Explanation system How an Explanation System might work where questions like how or why are dealt with. Inference Rules use an if-statement and a then-statem
How does Expert system works? System uses a rule base and an inference engine together to simulate human reasoning whenever analysing a problem and arriving at a conclusion. To
For the circuit in figure, find the current through each resistor.
(a) Average rainfall during the month of January is found to be R mm. A Class A pan evaporation recorded an average of [7 + ( R /100)] mm/day near an irrigation reservoir. The av
Q. Explain a Tube Well? Method of restoring or increasing the capacity of tube well is known as developing a Tube Wells. This is done to eliminate bridging of fine particles on
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