Electronics and Experimental Methods-Opto-Electronic Devices (CSIR Physical Sciences): Questions 5 - 6 of 6

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Passage

Light of wavelength 660 nm and power of 1mW is incident on a semiconductor photodiode with an absorbing layer of thickness of ln4μm .

Question number: 5 (2 of 2 Based on Passage) Show Passage

» Electronics and Experimental Methods » Opto-Electronic Devices » Photo-Detectors

MCQ▾

Question

If the absorption coefficient at this wavelength is 104cm1 and if 1% power is lost on reflection at the surface, the power absorbed will be –

Choices

Choice (4) Response

a.

250μW

b.

225μW

c.

750μW

d.

675μW

Question number: 6

» Electronics and Experimental Methods » Opto-Electronic Devices » Solar Cells

Appeared in Year: 2011

MCQ▾

Question

Monochromatic light of wavelength 660nm and intensity 100mWcm2 falls on a solar cell of area 30cm2 . The conversion efficiency of the solar cell is 10%. If each converted photon results in an electron – hole pair, what is the maximum circuit current supplied by the solar cell?

(Take h=6.6×1034Js , c=3×108ms and e=1.6×1019C ) (December)

Choices

Choice (4) Response

a.

320mA

b.

3200mA

c.

1600mA

d.

160mA

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