How to reverse the direction of a DC motor ? By reversing the Armature wires or by reversing the field wires

2 Answers   KFC,

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In Power Line Communication (PLC) the wave trap is used to block communication signals from entering neighboring lines. My question is this: Why do they allow for different filtering arrangements on these wave traps? Isn't it always going to be a low pass filter since we want the power frequency to go through, and the comm signal blocked?

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Operation carried out in thermal power stations?

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what is hystersis loss?

3 Answers  

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when a hand crancked meggar is used to check most three phase induction motors, how many tests r rquired? Why?

1 Answers  

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how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw

0 Answers   Videocon,

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how withstand of hi-pot test outputs of transformer wire 2.5mm

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Whats the difference btwn a latch, port,data bus buffer? Do they all not hold data in d flip flops??

0 Answers  

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What should be the earthing resistance of an industrial substation and also What should be the house hold earthing resistance?

20 Answers   Jindal, Pharma, TAAT, TATA,

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Is it true that in the 3 phase transformer, the limbs of the core are at 45 dgrees to each other. if true, why?

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What are the uses of stepper motor?

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plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.

0 Answers  

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