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Which of the following is operated in forward bias?

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in Physics – Class 12 by (135k points)
Which of the following is operated in forward bias?

(a) LED

(b) Zener diode

(c) Photodiode

(d) Solar cell

I had been asked this question in a national level competition.

My enquiry is from Semiconductor Electronics topic in section Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

1 Answer

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Best answer
Right option is (a) LED

Easy explanation: A light-emitting diode (LED) converts electric energy into light energy. A LED is a heavily doped p-n junction which under forward bias emits spontaneous radiation. The semiconductor used for the fabrication of visible LEDs must at least have a bandgap of 1.8 eV.

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