Answer Posted / devendra chaturvedi

if we gave transformer 5 hz instead of 50/60 hz at constant i/p voltage than B(max.flux density) increases t a very high value which saturates the core,increases the core losses to a very high value which may damage the core and transformer

What are the properties of a resistor?

1104

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Ceiling Fan and Storage type water heater. Discuss

1958

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Why can't we take NO LOAD TRIAL of motors having V1 mounting??

1918

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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?

4382

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What do you mean by lighting transformer?

1048

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what is efficient motors and how it is different from normal induction motors

1907

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What is the classification of hydro projects based on installed capacity?

1180

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what is the difference between "Rotary bypass isolation switch and Normal bypass switch" pls share indepth techs?

2054

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What is the general power factor & min. power rating of TV,LCD type TV, CRt type TV, Scanner, printer?

2052

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How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.

1720

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how to find motors H.P. whout any rating? (only give you a motor and multimeter)

6066

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can i use ups power as a raw power for another ups

1974

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what maximum range of star & delta in hp or kw ?

1683

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PLEASE TELL ME ABOUT QUESTION PAPER OF UPCL ENTERENCE EXAM.

7950

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Let me know that how i calculate the alternator sub tranciant reactance and tranciant reactance.

2629

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