Opto Electronics – 2

2. An LED is made up of :

(a) Phosphorescent material
(b) Germanium
(c) Silicon
(d) Gallium arsenide

Answer

Answer : (d)

Explanation

Explanation : No answer description available for this question. Let us discuss.

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Special Diodes - 127
5555555555127. LEDs are made out of (a) silicon. (b) germanium. (c) gallium. (d) silicon and germanium, but not gallium.
Tags: silicon, germanium, gallium, electronics, engineering
Opto Electronics - 6
Opto Electronics » Exercise - 16. A laser diode can be fabricated using : (a) Germanium (b) Silicon (c) Gallium arsenide (d) Gallium phosphide
Tags: opto, electronics, gallium, exercise, germanium, silicon, arsenide, engineering
Opto Electronics - 23
Opto Electronics » Exercise - 123. Which material is generally used to build LED ? (a) Compounds of gallium (b) Compounds of phosphorus (c) Compounds of germanium (d) Compounds of silicon
Tags: opto, electronics, exercise, material, led, gallium, germanium, silicon, engineering
Atoms and Electrons - 55
Atoms and Electrons » Exercise - 255. The transferred-electron bulk effect occurs in : (a) Germanium (b) Gallium arsenide (c) Silicon (d) Metal-semiconductor junction
Tags: exercise, germanium, gallium, arsenide, silicon, electronics, engineering
Opto Electronics - 25
Opto Electronics » Exercise - 125. The isolation capacitance of an opto coupler is in the order of : (a) 0.3 – 2.5 μF (b) 0.3 – 2.5 F (c) 0.3 – 2.5 pF (d) 0.3 – 2.5 nF
Tags: opto, electronics, exercise, engineering

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