Answer / nupurpatel

in ac source,frequency is fluctuate
in dc machine frequency is produced constant.. 

Answer / biswa.biswa2010

only one time on this is used in dc series motor.dc series
motor is slow.

why dc supply is not applied for step up or down in transformer

3 Answers  

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what is meant by unity power factor?unity means one why dont call 2,3,4......?

6 Answers  

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What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?

0 Answers   Jindal Steel and Power,

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Residual voltage & residual current used in which protection?

5 Answers   Qatar Gas, Reliance, Transformers and Electricals,

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Can any body describe me why a soft starter is used for 6.6kv induction motor instead of VFD ?

1 Answers   Cairn,

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Why LED light has advantage of rapid reflection ,although other lights alse reflect.? and this light is considered to be best for transmission usage in case of Free optics

0 Answers  

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WHAT IS INERTIA,AND WAT IS TORQUE.

0 Answers  

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A circuit breaker on detecting fault will a. Open b. Close c. Open and trigger the alarm

2 Answers  

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should %impedance be high or low in a power transformer? if so why?

0 Answers  

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How to Calculate Transformer Earthing Electrode Rod Size both Body and neutral Earthing ? Any Standard Formula? Please Suggted

0 Answers   EnPro,

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How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?

0 Answers  

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at what basis/standard we have to arrive the current density of aluminium/ copper in busbar?

0 Answers   ONGC,

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