Answer / yuvi

The colour of an LED is determined by the semiconductor
material used in it

Answer / ragu

THE FACTORS DEPEND UPON THE WAVE LENGTH OR FREQUENCY OF THE
LIGHT EMITTED. IT IS BASICALLY DEPENDS UPON THE CHARGE THAT
IS DISCHARGE DURING THE JUMPING OF ELECTRONS FROM HIGHER
ENERGY LEVEL TO LOWER ENERGY LEVEL..

Answer / kaparapu sreekanth

colour of LED depends on frequency,so colour of light varies by adding impurities while doping

why CERAMIC material is used in insulators??

1 Answers  

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What is mean by % impedance of transformer? detail explanations expected.

1 Answers   FCUK,

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what is the calculation of current when a clampmeter is attached to two phases of any drives.

3 Answers   ABB,

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a starter used for squirrel cage induction motor?

0 Answers  

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one KVAR takes how much amps, and how to add power capacitors to electrical panels, for example if one of the MCC drawn 800amps means how much KVAR required

1 Answers  

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what is thyristor, how is it works

1 Answers  

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what is the use of Reactive power in power system?

3 Answers  

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Is it necessary to install Lighting Arrester on both side side (i.e HT and LT) of Transformer in a transmission substation? if yes Why on both side?

1 Answers  

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what happened if power factor is "1"

9 Answers   Reliance,

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How can a transformer test by megger?

1 Answers   Bosch,

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who can measure the size of power cable?

0 Answers   Chanar Sugar Mills,

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what is the permissible bend in the LT& HT CABLES.

2 Answers  

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