Write a note an solar cells.

Explanation

The various devices used for harvesting sun's energy are called solar energy devices.
Solar cells :
(i) Solar cells (Photovoltaic devices) is made up of silicon that converts sunlight directly into electricity. (ii) Solar cell produces electricity without polluting the environment.
(iii) Since it uses no fuel order than sunlight, no harmful gases, no burning and no wastes are produced . These can be installed in remote and inacessible areas (forests and hilly regions) where setting up of power plant is expensive.
Uses of Solar cells :
(i) It can be used for street lighting , traffic signals, water pumping ,battery charging system etc.
(ii) It is used in artifical satellites and space probes.
(iii) It provides ratio and TV transmission to remote areas.
(iv) It is used in calculates , electronic toys and watches.