Question

Write two applications of photoelectric cell.​

Answer 1

Answer:

1) Reproducing voice in cinematography

2)Study temperature of stars

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Answer 2

Answer:(i) Photoelectric cells are used for reproducing sound in cinematography. (ii) They are used for controlling the temperature of furnaces. (iii) Photoelectric cells are used for automatic switching on and off the street lights. (iv) Photoelectric cells are used in the study of temperature and spectra of stars.

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