Answer / niranajn

Due to the presence of harmonics as the magnetising current
is especially rich in third harmonics

Answer / abhishek

no load current is magnetizing current, and therefore will
be non-sinusoidal due to the hysteresis of the magnetizing
force in the core.

why current flow throgh conductor.

2 Answers  

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why do we not use equivalent voltage source in negative sequence equivalent ckt.

0 Answers   TATA,

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At no load the PF of an alternator -Zero -Zero Lagging -Zero leading -None of the above

2 Answers  

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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . please reply..............

9 Answers   NTPC,

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What is power factor? Whether it should be high or low ? why?

9 Answers  

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What is step signal?

0 Answers  

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What are the two types of compensation?

0 Answers  

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Define rise time.

0 Answers  

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What is 100% protection of generator? Why 100% is not used but 95% is generally used?

0 Answers  

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what is power transformer?

2 Answers  

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Size of the 60Hz and 400Hz transformers is a) same b) 60Hz Tr s larger than 400Hz Tr c) 400Hz Tr s larger than 60Hz Tr d) None of the above

5 Answers   Ecil,

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what happens when power factor leads or lags to electical or home appliances

2 Answers  

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