Answer Posted / prabhakaran

DC transformer is not possible.according to transformers
mutual induction principle,which can possible only on
alternating current (AC).

1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

8166

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What types domain of laplace transforms? What behavior can laplace transform predict how the system work?

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how to calculate the formula of cable size if motor kw is given

2260

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is there any lightning by passer is arranged in ship like buildings?

1931

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what is the difference between oil surge relay and buchholz relay.

7029

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What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???

2165

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what is current check gurd relay?

2591

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What is UPS and How do you maintain the UPS Maintenance? Brief Description on UPS maintenance.

2577

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What are the main significances of root locus?

1225

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how to read idmt curva

2276

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sir i want previous entrance exam papers for written test

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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 . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

1808

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what is the star delta connetion and how can do it a three phase motor with control witing with picture

2263

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operation of protection relay watchdog contact?

2392

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The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

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