railway Gujarat Metro Maintainer 2023 Mock Test Electronic Devices Optical Devices Light Emitting Diode (LED)
Which of the following statements is true for Bi Colour LEDs?
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