Answer / kalyan

condition for max efficiency of 3-ph transformer,when core
loss=cupper loss.
condition for max efficiency of d.c.motor,back e.m.f=supply
voltage/2

Answer / manoj tyagi

for electrical machines max. eff.
veriable ohmic losses=constant core loss

In simply words(not explain any formula )what do you mean by power factor.?

5 Answers   DRDO,

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xlpe cable 4 core nuetral wire is small why ?

3 Answers  

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what happens when the phase and earth wires comes in contact? and why

2 Answers  

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If ac 230volts inputsupply to full wave rectifire what is D C output voltage.

3 Answers  

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What is the Diference between DYN 11 and DYN 5 .How to change the Vector group from DYN 11 to DYN 5.

3 Answers  

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What will happen if " not connecting the neutral point to ground of diesel generator output (380 V)", also if someone touched one phase without isolation from ground during the A/M condition what will happen to him?

3 Answers  

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Arrangement of earthing materials.like what we put first charcol,then salt.then plate. Plz answer me about that.

1 Answers  

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230v 1 phase Phase and Neutral insert in Bulk water what happens.

1 Answers   IVRCL,

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i am electrical and elctronics engg passed out in 2009 want to attend for reliance placements.plz send me apttitude ,technical and hr question answers to my mail plz. my mail id-kat.bindas@gmail.com

0 Answers  

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What is the effect on power factor, shown by a trivector meter; incase of reverse phase sequence. If the power factor of a system is lag what meter will show in case of reverse phase sequence connected to the meter. and What in case of lead.

0 Answers   TATA,

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what is meant by phase transformation ratio in induction motors?

2 Answers  

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Can we use the Poly Phenly Sulphide instead of Poly Phenly Ether? Do clarify your opinion.

1 Answers  

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