A phototransistor has collector current of 18 mA, incident optical po – McqOptions

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1.	A phototransistor has collector current of 18 mA, incident optical power of 128 μW with a wavelength of 1.24 μm. Determine an optical gain.
A.	1.407 *102
B.	19.407 *102
C.	2.407 *102
D.	3.407 *102
Answer» B. 19.407 *102

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