Dry Cell
What is dry cell? Definition of Dry cell. Working
of Dry cell. Principle of Dry cell.
Definition
A cell is the simplest unit for
making electricity. It generates electricity from chemical reactions. It pumps
electrons along wire. Two or more cells forms a battery. It is called Dry cell
because it contain no liquid components. The dry cell is the modification of
the wet Lechlanche cell. A dry cell is a type of electric battery,
commonly used for portable electrical devices.
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Dry Cell |
How a cell works?
Substances such as acids dissolve
in water to form charged particles called positive ions (cations) and negative
ions (anions). These types of solutions forms electrolyte of a cell. Metal rods
immersed in electrolyte act as electrodes. Positive electrode is anode while
negative electrode is cathode. These electrodes attracts oppositely charged
ions resulting in flow of electrons.
Parts of Dry cell
1.
Brass knob
2.
Positive electrode
3.
Zinc container
4.
Pitch
5.
Insulating Thick paper covering
6.
Manganese dioxide + carbon
7.
Ammonium chloride jelly
8.
Cardboard Washer
The Chemical Reactions
· The oxidation reaction at the Zinc cathode
·
The reduction reaction at the graphite anode
Dry cell produce a voltage of about 1.5 volts.
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