why some time Railway Fan not Rotate,But after a small rotation by human then it rotate normally? Why?

4 Answers  

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What range of speed can you get with the armature control method of speed control of d.c. Shunt motor?

0 Answers  

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What is Exitation voltage and Exitation current? What is the function of these in Alternator?

2 Answers   TC, Tisco,

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which INDIAN STANDERD in Mention the earth test value?

1 Answers  

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what is the form factor of DC voltage

5 Answers  

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advantages & Disadvantages of Solar power system?

2 Answers  

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armature winding of dc machine produce alternating emf then it convert in to dc by using commutator.But only we consider armature resistance why don't we consider inductive reactane effect?

0 Answers   APTransco,

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Why Nutral CT rating for Earth Fault Protection of Transformer neutral shall be 20% of Full load Current of Transformer

2 Answers  

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what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

0 Answers  

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To transmit the Power which must be present…? a) Reactance b) Resistance c) Capacitance d) none of above

9 Answers   ABC,

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i am using auto transformer for starting of induction motor to provide reduse voltages...but the principle of a tansformer according to definition"which transform energy to on circuit to another circuit with constant power and constant frequency". so if i am using reduse voltage then current obsely hige because power is same.but we use auto transfarmer for starting of induction motor to give low current.but here according to definition we are giving hige current.

0 Answers  

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Why alternators are rated in KVA?

12 Answers  

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