Answer Posted / sreekanth

In a DC supply constant voltage is maintained.. whereas in AC voltage and current are changed..we know the basic principal of transformer is mutual inductance..for which current in one coil must change uniformly.. in DC supply it is not possible so DC supply is not used for transformers..

what happens in the short circuited secondary transformer,if the resistance of the short circuit is increased gradually?

2362

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Please nybody say, weather the result of Bharat Oman is declared or not? Probable date of declare???????

1994

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What will happen if we introduce negative feedback to a control system that uses a positive feedback?

1089

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Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

2581

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what is the prosses for getting of 33kv licence (i have completed my engineering degree & working in 33kv substation for contract basis )????

1933

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How can i get my certificate of competency as an electrical supervisor? I have complicated my B.Tech from Uttarakhand technical university this year (2012).

4508

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What is the drawback of class b amplifier? How is this minimized?

1126

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What type interview questions ask in Electrical technicians

1775

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how to estimate wiring ins roughing ins. and boxes

2395

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Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.

2102

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Grid fault level [KA]?

2603

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Can i use the B-curve MCB instead of C-curve MCB

2020

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why transformer tank is in rectangular shape what happen when it is in step shape

1447

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what is the reason the main breaker is trip during the motor is running? (some time the breaker is not trip)

1782

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cc of scorpio?

2272

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