65ᵗʰ B.P.S.C. (Re-Exam) (Pre) 2020
Which of the following statements is false regarding LED (light-emitting diode)?
aLED light sources consume less energy
bLEDs last longer than light bulbs
cLEDs use mercury, which is harmful to humans✓ Correct
dLEDs are used in traffic signal lights
eNone of the above/More than one of the above
Explanation
LED (Light Emitting Diode) is a semiconductor device that produces light when electric current flows through it. Mate- rials such as gallium phosphide and indium gallium nitride (InGaN), etc., are used in its composition. Mercury (Hg) is not used in it.
general-science