Answer / bala

carbon is a NTC(negative temp coefficient)material. its
resistance decrease while temp gets rise. also carbon gives
wear for give smooth rotation without friction. so its used to
give smooth rotation and less resistance in electricity..!

what is exiter winding,stator winding,avr?how it will work?

1 Answers   Siemens,

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Is current scalar or vector?

11 Answers  

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New istallation how many eathing have one transformer? Names of earthing connect places?

10 Answers  

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what is the difference between AHU and FCU .

1 Answers   JLL,

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In HI POT test what is reason for applying the AC VOLTS and DC VOLTS in different applications what is the nessesity for this ?

0 Answers  

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How does CT can measure the high value DC current?

4 Answers  

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what is a tri vector meter? what are the tri vectors?

2 Answers  

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Why do we will ground the positive terminal in electrostatic precipitator

1 Answers   JSW,

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in single phase circuit if i connect a heater between phase and neutral, then what will be the current path? phase to neutral or neutral to phase.

4 Answers  

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can we produce cosine wave instead of sine wave? will it usefull?

4 Answers   BARC,

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by what factor the starting current is used when comparing star and delta connection for motor starting?

0 Answers  

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In case of HV test on medium voltage cables, BS is asking for 4 U0 where as IEC is asking for 3.5 U0. Can any one advise me how this 3.5 times or 4 times U0 is derived?

0 Answers  

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