In AC if the direction of current keeps reversing every half cycle, how does it propogate through the transmission lines?

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How to calculate Earth busbar size & what is the procedure we make for determine that?

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difference b/w semiconductor and insulator

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how can we measure rotor current of a 3phase wound rotor induction motor connected to liquid resistance starter

1 Answers  

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what happend if we remove dc exciter from moving machine..: gg

4 Answers  

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how many types of ACB breakers, describe briefly..?

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what is dc mator?types of dc motor?losses in dc motor?what is the mechanical,electrical and commercial efficiency of a dc motor?

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How much amps carry in single phase R-phase,in D63A 4-pole MCB

1 Answers   TCS,

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ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]

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What is the distance b/w R&Y phase in 33kv T.line,11kv &440v

1 Answers   NTPC,

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i have one source transformer with the capacity of 50KVA, connected with two loads 10kw and second one is 15kw.. how can i calculate first load in KVA and second one in KVA .. because Kva rating, power factor rating of of transformer is different from the load… there must be some way to calculate load KVA rating and power factor….

1 Answers  

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plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.

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