రంగు మారుతున్నందున, ఫార్వర్డ్ వోల్టేజ్ దేనిలో మారుతూ ఉంటుంది:?

This question was previously asked in
RRB ALP Electronics Mechanic 23 Jan 2019 Official Paper (Shift 2)
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  1. LED
  2. LCD TV
  3. కలర్ టీవీ
  4. LED TV

Answer (Detailed Solution Below)

Option 1 : LED
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Detailed Solution

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  • కాంతి-ఉద్గార డయోడ్ (LED) అనేది అర్ధవాహక పరికరం, ఇది విద్యుత్ ప్రవాహం ద్వారా కాంతిని విడుదల చేస్తుంది.
  • రంగు మారుతున్నందున, LED లో ఫార్వర్డ్ వోల్టేజ్ మారుతుంది.
  • సాధారణంగా, LED యొక్క ఫార్వర్డ్ వోల్టేజ్ 1.8 మరియు 3.3 వోల్ట్ల మధ్య ఉంటుంది.
  • "తెల్లని" LED అధిక వోల్టేజ్ కలిగి ఉంటుంది, సాధారణంగా 3.2 - 3.6V.

వాటి రంగు మరియు వోల్టేజ్ డ్రాప్‌తో వివిధ LED లు క్రింది విధంగా ఉన్నాయి:

 

Semiconductor Material Wavelength Colour Voltage Drop (Forward)
GaAs 850 - 940 nm Infra - red > 1.9 V
GaAsP 630 - 660 nm Red 1.8 V
GaAsP 605 - 620 nm Amber 2.05 V
GaAsP:N 585 - 595 nm Yellow 2.15 V
AlGaP 550 - 570 nm Green 2.2 V
SiC 430 - 505 nm Blue 2.6 V
GaInN 450 nm White 3.5 V

 

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