Which of the following statements is true for Bi Colour LEDs?

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ALP CBT 2 Electronic Mechanic Previous Paper: Held on 21 Jan 2019 Shift 2
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  1. Two different colour LEDs are connected in series in the reverse direction 
  2. Two different colour LEDs are connected in series in the same direction  
  3. Two different colour LEDs are connected in inverse parallel
  4. A special dopant is used for producing two colours in on LED

Answer (Detailed Solution Below)

Option 3 : Two different colour LEDs are connected in inverse parallel
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Detailed Solution

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  • Bi-color LEDs are same LEDs as uni-color just there are more than one LED housed in one package. 
  • A bi-colour LED has two LEDs wired in 'inverse parallel' (one forwards, one backwards) combined in one package with two leads.
  • One LEDs anode is connected to another LEDS cathode and other lead same way.
  • Only one of the LEDs can be lit at one time.
  • They are less useful than the tri-colour and RGB LEDs. 

F2 Neha Madhu 17.10.20 D6

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