WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

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what is meant by moulded case circuit breaker ?

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Why r use in the tap changing x' mer.

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If we says that current is flow only when there is closed path & neutral work as a return path for the same. Then how circuit is closed in three phase as no neutral available ??

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What is on delay and off delay timers

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Why can we connect the mobile charger both ways?

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what is ceiling voltage in an exciter?

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in transfomer which type of oil is use!

9 Answers   Essar,

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Why phase sequence ryb called colours.

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How we can calculate the Amps for the cable Ex:- For 1sqmm wire how many amps we can draw (calculation)

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what is DRP panels?

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