Answer Posted / p mishra

Coal are the form of graphite which is a best conductor.So
for reducing the earth resistance we use coal.Like salt is
made of Na+ Cl-.These ions are good conductors of
electricity, hence the earth resistance does reduces when
salt is present on earth. Water conducts partially. So all
the materials when mixed the resistance/ohmic value is
reduced.

what are the types of electromagnetic forces developed in practical transformer?

2637

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Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?

1874

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how do we calculate length of starting time and repeated starting of a direct online starter?

1980

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What are the roles and responsibilities of electrical engineer in cement plant

2036

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how mass curve differs from hydrograph.

1800

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Maintenance of transformer???

2269

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HOW TO DESIGN THE body EARTH cable(Copper Conductor) size for 60KVA UPS?

2001

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WHY THE RATINGS OF THE TRANSFORMER IS 33KV WHY NOT OTHER???

2392

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How good are you in resolving the commercial issues to Employer's advantage?

2362

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What are the Full Forms of TVM, MTL, CVT ?

1440

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I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

2322

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Match the following a)(X'+Y') b)X'Y' C)XY 1)NAND 2)NOR 3)Carry

1932

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What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?

2006

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full form of flry b

4169

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What will be the effect if I use inverter as UPS mood?

2204

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