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Optoelectronic Devices for GUJCET: 4 solved questions

Real GUJCET paper questions on optoelectronic devices, part of semiconductor electronics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2016 to 2023. No sign-in needed to read them.

What this topic asks

• Photodiode and solar cell — 3 questions
• LED — 1 question

All 4 questions with solutions

• Which type of semiconductor device does not need any bias voltage? GUJCET 2016
• In a p-n junction solar cell, the ratio of the thickness of the p-Si wafer to the thickness of the n-Si layer… GUJCET 2023
• The minimum band gap (E_g) of semiconductors used for fabrication of visible LED is eV. GUJCET 2023
• For detecting the light, RS Academy GUJCET booklet