In an experiment on photoelectric effect, light of wavelength 800 nm (less than threshold wavelength) is incident on a cesium plate at the rate of 5.0 W .The potential of the collector plate is made sufficiently positive with respect to the emitter so that the current reaches its saturation value .Assuming that on the average one of every 106 photons is able to eject a photoelectron, the photo current in the circuit is in the form 8x × 10–7 A. Find the x.
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