Uses of Photocells

Topic Content:

Photocells are used in

i. Photometers

ii. Burglar alarms

iii. Automatic doors

iv. Television cameras

v. Counting operations

vi. Sound production from film tracks

When light of appropriate frequency falls on the cathodeA cathode is the electrode from which a conventional current leaves the electrolyte. It is the negative part of the cell where reduction takes place. More photosensitive surface,