images.library.wisc.eduimages.library.wisc.edu/WI/EFacs/transactions/WT1938/...Figure 2 is the...
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images.library.wisc.eduimages.library.wisc.edu/WI/EFacs/transactions/WT1938/...Figure 2 is the circuit diagram of the amplifier. Light falling on the photocell causes a proportional