AAI ATC Junior Executive 25 Mar 2021 Shift 3 Paper

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Question : 94 of 120

Marks: +1, -0

Which of the following statement is true for a wavelength of 1000 nm. A p-n photodiode is fabricated from a semiconductor with band gap of 1.9 eV.

The photodiode can detect signal once the energy of signal is increased.
The energy of a signal of given wavelength is more than the specified band gap
The photodiode can easily detect signal
The photodiode cannot detect signal

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