Answer / nithi

yes.The poles changes for every half-cycle of ac voltage.

Because the polarity of AC voltage is continuosly
changing for every half cycle.
so, interchanging of terminals in ac system
does not show any difference.That's why the ac solenoid
attract the plunger eventhough it's terminals are
interchanged.

how many typetesting of transformers?

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corona happens more in ac or dc?

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3.The slip of an IM UNDER FL condition is about.....

1 Answers   SSC,

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Why oil preferred over the air as a cooling medium for high rated transformer?

1 Answers  

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what is the minimum voltage require to injure our body?

4 Answers  

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how to calculate power consumption in slip ring motor at different step

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A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

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what is the circutor?why we use it ?

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what is the meaning of 0.5ohm Resistance

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