Why dc voltage used to excite alternator field in stead of ac?

4 Answers  

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what is the difference between Inverter and ups

1 Answers   L&T, MTS,

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what is power factor ?

12 Answers   KSEB,

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If Ac supply is given to the DC motor then what will happen? clear explanation

2 Answers  

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When we use 3 terminal resistor?

0 Answers  

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explain the function of brush less dc motor?

0 Answers   Bhel,

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what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end

0 Answers   Areva,

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we change the speed of the synchronous motor by incresing or decreasing a rotor resistance

1 Answers  

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Cummins 750 KVA generator how much disel consumed per hour and how many units generated on 100% full load.

1 Answers  

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hi, in the event earth grounding is not available in a project, is there any other way to make the elcb work? fyi, i have an instant water heater (6.5kw) installed, however if there is grounding in the heating element inside the heater assembly, i will get grounded. thank you in advance to those who will answer my question.

0 Answers  

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1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?

0 Answers   TATA,

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2 electric bulbs of 100w,200V are put in series & the combination of each bulb is supplied to 100 V . the power consumption of each bulb will be????????

4 Answers  

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