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photocell

A CdS photocell has a separation between electrodes of 300 _m, with electron

lifetime and mobility of 3 ms and 300 cm2/(Vs), respectively. (a) What voltage

must be applied between electrodes to generate a photoconductive gain of 500? (b)

Determine the photocurrent that results when 2 _W of 500 nm light is absorbed in

the photoconductor.


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