how to find the transformer effiiency

3 Answers   Bosch,

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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?

0 Answers  

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What is the function of electron gun used in crt?

0 Answers  

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can we synchronize star system generators with delta system transmission line ? and how ?

0 Answers  

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whether the battery is voltage source or current source?

2 Answers  

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What is the dc grounding system and what is diff between AC/DC grounding system?

0 Answers  

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Give two basic speed control scheme of dc shunt motor?

0 Answers  

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what is the Maximum voltage range for single phase

4 Answers  

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if earthing is not connected to computers any problem ?

2 Answers   HP,

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Ps Explain YWY,AFWY Type Cable

1 Answers  

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2. What are the parameters of EHT sub-station?

0 Answers   APGenco,

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ganaretors A check B check and C check details

1 Answers  

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