How one can say about a device (e.g: a light holder contains 20 or 30 L.E.Ds which glows when power supply is off, from which source they are getting the supply..... battery or capacitor) without removing and opening up its case ?

1 Answers   CMC,

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How to calculate cable size in sq units based on motor rating is KW

2 Answers  

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short notes on npn & pnp transisitor..........

5 Answers  

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hoe to test voltage restrained overcurrent relay?

2 Answers  

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why transformer rated in KVA not in KW ? we know that W= v*i

6 Answers  

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why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?

0 Answers  

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What is mean by power factor?

18 Answers   Shreem Electric Ltd,

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what is the thumb rule for determination resistance of resistor?

0 Answers   Siemens,

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how to calc. current for 5MVAR,50hz,33kv

1 Answers  

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why the no.of slots in stator in not equal to the no. of stator in rotor in induction motor????

4 Answers   Jindal,

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what is different between grounding and earthings?

4 Answers  

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what is motor capacity of 80TR chiller? and also say what is the formula related temperature, motor capacity, TR?

0 Answers   Apotex, Periyar Chemicals,

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