8) What is photoelectric cell?
Ans: Photoelectric cell is a cell used to convert light (such as sunlight) to electricity using photoelectric effect. It comprises of 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.
Ans: Photoelectric cell is a cell used to convert light (such as sunlight) to electricity using photoelectric effect. It comprises of 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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