Answer Posted / srnmurali

to start a motor we need rotating magnetic field. this will
be produced by two windings.

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?

4429

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diameter of cable and core is doubled then the value of capacitance is

4364

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dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

2128

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What is time response of the control system?

1130

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What are Contactors? How they works and what its highest rating?

2212

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Explain Random and Deterministic signals?

1849

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2650

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give single line diagram of D.G distribution form alternator to main L.T panel?

7611

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if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

1708

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Air circuit breaker safety

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how can we change the polarity of Alternating current rapidly? how frequency of ac can be controlled and changed easily?

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I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?

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How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V

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primery try cell?

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