Thursday 14 March 2013

PHOTOELECTRIC EFFECT - Q9

9) What do you know about the structure of photovoltaic cell?
Ans: Photovoltaic cell is a cell comprising an electron tube with a photosensitive cathode that emits electrons when illuminated and an anode for collecting the emitted electrons. The voltage between the anode and cathode causes no current in darkness because no electrons are emitted, but illumination excites electrons that are attracted to the anode, producing current proportional to the intensity of the illumination.

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