Answer / shimin

Because the value of permittivity of free space is very small compared to permeability of free space.

what is bjt & mosfet? what is rectifier & diode?

1 Answers  

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What is meant by reactance voltage?

0 Answers  

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What is derating?, Why it is necessary, it is same for all means for drives, motors,and cables.

1 Answers  

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is it possible to flow currnet between earth and nutral wire in a circuit???

2 Answers  

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HOW TO CALCULATE THE VT SIZING?

0 Answers   L&T,

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what is frequency? and its importance

3 Answers  

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Meaning of ingrace protection for motor.for ex IPXY

0 Answers   BARC,

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Why a Transformer Noise during its running condition ??

11 Answers   NTPC, UPPCL,

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At site, we have 30Kw motor (3 phase, 400V,50Hz) and FLC 54A as per the nameplate. At the time of starting it draws 840A instead of 390A (7.2%). As per the data sheet also its 390A starting current. it thru a dol starter from the MCC. can anyone tell what is the problem in the motor

5 Answers   ME,

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any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?

0 Answers  

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While testing the value of the resistance for the earthing rod, two auxillary rods are connected to the earthing tester.What is the working function of a earth tester?

0 Answers  

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What will happen if we give the 3 phase supply to the rotor of slipring induction motor?

3 Answers  

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