How dc generators direction can be reversed ??

2 Answers   GPSC Gujarat Public Service Commission,

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what is mathematical relation between ac to dc current how will convert Iac=50amp to Idc

7 Answers  

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what is the function AND aplication of CBCT?

2 Answers  

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how can testing using megger?

1 Answers  

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when an induction motor runs on load.at that time if we reduce the supply voltage the current increases.But when it runs without load,if we reduce the supply voltage the current also reduced.why?.i checked it practically also.

1 Answers   Birla,

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Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction

0 Answers  

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in india why the generating voltage is like 11kv,22kv etc

1 Answers   Alstom, Ford,

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What is cogging and crawling phenomenon in motor.

2 Answers   DAE,

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How can i check a relay good or not?

2 Answers  

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i have 400/230v transformer and didnt done the neutral eatrhing. i connected one lamp to one phase and neutral to the earth. but the lamp is not glowing. again i connected neutral to earth and repeated the same. then the lamp is glowing. in the first condition i tested with a line tester also, at that time the tesrer is glowing what is happening i dont know can any one help me?

1 Answers  

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why we can choose induction machine in wind mill? why can`t use synchronous machine?

3 Answers  

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How to select the releases for MCCB ?

1 Answers  

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