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Question

(a) Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place.
(b) What differences would you expect in the charging of car batteries (i) on bright sunlight (ii) on a cloudy day (iii) at night ?


Solution

(a) Solar cells called photo voltaic cells  convert solar energy into electrical energy.
While charging the batteries, electrical energy is converted into chemical energy.
During the use of batteries, chemical energy is converted into electrical energy; after which  electric motor converts electrical energy into kinetic energy (which drives the car).
(b) (i) Batteries get  charged very  quickly.
(ii) Batteries get  charged very slowly.
(iii) Batteries do  not charged at all.


Physics
Science for Tenth Class - Part I - Physics
Standard X

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