What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?

0 Answers   Jindal Steel and Power,

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why do we generate sinusoidal ac?can we generate some other waveforms by alternators?

11 Answers   Siemens,

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What is mechanical interlock?Explain the uses?

2 Answers   HSL,

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which type of motor we are using in local train???

4 Answers   Asia MotorWorks AMW,

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HOW DOES THE PERCENTAGE DIFFERENTIAL PROTECTION WORK IN POWER TRANSFORMER

1 Answers  

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when a pure dc signal is sent through a moving iron meter, what will it read?? dc or rms?? when a variable dc signal is sent through a moving iron meter, what will it read?? dc or rms??

1 Answers   GATE,

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if voltage is not builed up in small generator what will be the reason?

7 Answers   century,

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Why we use DC for charging of Batteries??Why not AC Supply???

6 Answers   Emerson, Infosys,

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A 200W,230V lamp is connected across 115V supply.The lamp will draw power?

6 Answers   SJVN, TCS,

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what is rated speed?

4 Answers   Actavis,

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Can I use RCCB in moisture control device in a submersible pump.

2 Answers   TATA,

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Is earthing done for AC or DC or both?

6 Answers  

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