How to design power source say 5KW i/p :415v 3 ph, o/p 5KW constant, variable currnt and variable volatge 10-230v,

2 Answers  

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two bolbs of 100w and 40w respectively connected in series across a 230v supply.which bolb will glow bright and why?

16 Answers   DRDO, PSPCL, Siemens,

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does meager test perform on lightning arrester ? if doesn't then why ?

1 Answers  

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Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA ?

2 Answers  

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what happens if sf6ckt breaker gas pressure is high or low about the actual rating of gas pressure(5kg/cm2)

2 Answers  

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What is partial discharge in power cable?

1 Answers  

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What is meant by knee point voltage?

2 Answers  

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how to calculate voltage drop in long distance cable? for an e.g lamp of 12 volt ac ,300watt is 90 meter away from supply i.e (x'mer 230 v / 12v)and i m getting 8 volts at lamp terminal ....

1 Answers  

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For a DY11 lighting Transformer on primary side whee to connect fourth lead? from nuetral or from ground?

3 Answers   Sabic,

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what is the AC Plant and how can do the work with parts and picture tell us 150 Tr

0 Answers   Wipro,

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in my observation NCT is used at Karnataka power transmission. why we are not used in andhra pradesh

1 Answers  

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an electric bulb is connected on a holder. one end of the wire is connected to the phase and the remaining one connected to earth instead of neutral. the bulb will glow or not? if yes then what is the need of neutral?

7 Answers  

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