Answer Posted / akash malhotra

The working principal of dc motor is based on faraday's law
of induction.
When a current carrying conductor is placed in magnatic
field it exprieance a torque.

Applications of dc motor are
toys,robotics,Lathes,Drills,Boring mills,Shapers,Spinning
and Weaving machines,Electric traction,Cranes,Elevators,HAir
compressor,Vacuum cleaner,Hair drier,Sewing machine

briefly explain principle of resistance welding

1899

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why we used dc supply for field in dg set

2427

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Power Factor Correction Panel (Manual & Automatic)

2286

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why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?

1836

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How to use earthing on shipments.

1494

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How does HT work & Voltage required?

2330

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what is the principle of operation of tungstun bulb ??

1878

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Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.

2426

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sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason

1533

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Why 1/3 is used in symmetrical components?

1897

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write circuit diagram for a motor rotate in forward direction once it started and when pressed the same button it should rotate in anticlockwise.

2612

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At full load wat is the motor p.f And at no load will is the motor p.f?

2179

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How much costly in percentage wise is sandwich busduct costly than air insulated busduct of any rating?

1844

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why occ characteristics curve in not tracing back when we are bringing back the rhoestat?

1912

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How wire size can define in electrical wiring? What is the ratio?

2344

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