Question

Write any four uses of photo cell

Answer 1

hi mate....

PHOTOCELL:-

it is a device which converts light energy into electrical energy.

USES:-

1. THEY ARE USED IN TELEVISION.

2. THEY ARE USED IN FIRE ALARMS.

3 . Photocells have myriad uses, especially as switches and sensors.

4. Photocells may be used in the place of variable resistors and photovoltaic          cells

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Answer 2

Answer:

Explanation:

Photoelectric cells are used in the following ways:

I .In cinematography, photoelectric cells are utilised to reproduce sound.

2.They are also used to regulate the temperature of furnaces.

(iii) Photoelectric cells are utilised to turn on and off street lights automatically.

(iv) In the research of star temperature and spectra, photoelectric cells are used.

(v) Photoelectric cells are also utilised in space travel to obtain electrical energy from sunshine.

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