How will polarity test of Dy5 Transformer ?

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why fan consume constant power even when we increase or decrease its circuit resistance through speed regulator???

2 Answers  

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Auto transformer starter gives the same effect as star/delta strater if its turn ratio = A 0.5 B 0.67 C o.66 D 0.577

1 Answers  

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resitance in ac=1.6*resistance in dc

3 Answers  

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Why mostly conductor made by 7 nos wire?

2 Answers  

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what is the meaning of pi value?

1 Answers  

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R=*¶ l/a

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Why not instal the NGR in 11kv/433kv trasformer?

3 Answers  

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How to calculate u.p.s load parsentage plz give me formula

1 Answers  

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What is transister , thermister , thyrister? what is its function? where this using?

1 Answers  

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why starting current is high and resistance is almost 0 during the starting of motor dc motor...?

0 Answers  

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for which possible reasons a motor can fail to start??

4 Answers   CEB, Essar,

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