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Applications of Photoelectric Cells #8211; (i) It is used to determine the capacity of solids and liquids. (ii) Photocells are also used in Burglar alarm and fire alarms. (iii) Photoelectric cells are used to control the temperatures of furnaces. (iv) Photoelectric cells are used in cinematography to reproduce sound. (v) Photoelectric cells are used in the study of the spectra of stars and temperature.
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