Answer / mubeen saifi

White colour LED is possible. By combining blue,green and
red colour LEDs in one shell. And by maintaining an optimum
temperature because temperature is responsible for colours
on Kelvin scale.

Why generally the Rating of Transformers are in additions of 11 i.e. 11 kVA, 22 kVa, 33 kVA, etc........

8 Answers  

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Why is starter necessary for a three-phase induction motor?

37 Answers   BMM, Essar, Hero MotoCorp, ITI, Maruti Suzuki, Supertech, Watt,

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What is float cum boost charging system?

0 Answers  

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what is the max working temperature of an oil filled transformer say of about 1500kva.

3 Answers  

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Describe the colour rendering properties of i) tungsten filament lamps ii) tubular fluorescent lamp

0 Answers  

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why rotor winding in induction motor is not earthed. normally we uses star winding in rotor .why?

3 Answers   Anglo Platinum, TATA,

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why there is a phase difference between line voltage & phase voltage ?

4 Answers  

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open circuit test when performed on double the voltage & double the freq, then what will happen with p.f and current magnitude?

1 Answers   Aarti Drugs,

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What is complex power?

1 Answers   DRDO,

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How two nos. 130 kw D.C motor get synchronise using D.C drive.

0 Answers  

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why write 500v on line tester (Test pen)

3 Answers  

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What does substation operator do in substation?

2 Answers   ABB,

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