Why carbon brush used in dc motor also why its not used in ac motor?

2 Answers   RRB,

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I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR

0 Answers  

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when neutral will carry the current?what could be the magnitude?

7 Answers   Voltas,

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how we do Vector group ,magnetic balance and tap changer test in Transformer?

0 Answers   Afcons, BSL, HPL,

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what is the distance maintained between the power and data cables with respect to the KVA .... plss give me the formula

1 Answers  

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what type of insulation is used for over head lines?

4 Answers   NTPC, WS,

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kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased

0 Answers  

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What is load boxes ?

0 Answers   AMIE, PEPL,

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Please give the formula for converting from 1 tr refrigeration to kw.

2 Answers   Bugema University,

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how can we design robots

0 Answers   Maruti Suzuki,

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what is the function of turbo in dg sets

1 Answers  

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what is the difference between main meter CT and check meter CT?and what is the difference between main meter PT and check meter PT?

2 Answers   Tesco,

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