7. Why AC motors, AC bulbs etc... are donot operated by DC signals? and Why DC motors, DC bulbs etc... are donot operated by AC signals?

2 Answers   Bhel,

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Give some differences between open loop and closed loop control systems.

0 Answers   GE,

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how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

0 Answers  

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BRIEFLY EXPLAIN THE STORAGE CLASSES AND THEIR TYPES IN C

0 Answers  

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why we are using panel space heaters in different control schemes????

3 Answers   Mecon,

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How can I known multiplying factor .without multiplying table

0 Answers   Student,

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A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

0 Answers  

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Dear,  How much ph is maintained of water electrolite used in lrs for slipring induction motor ?

1 Answers  

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Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

0 Answers  

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cost of operation of which plant is least?

6 Answers  

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Describe how a salient pole / projecting pole rotor differs from a cylindrical rotor and state the application of each rotor respectively

3 Answers  

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Which are resistive loads & which one are inductive loads : Refrigerator, Split air conditioner, ceiling fans, well pump, fluoresecent bulbs, T.V, CRT Monitors, Adsl Routers, C.P.U, Printers, Deep Freezers, Speakers, DVD Players, Microwave oven etc. ? Output Power for these Appliances Would be same like this : P = V * A * P.F Or would be changed ? thanks

0 Answers  

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