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The cell or a battery has a carbon rod inside it in which the chemical reactions take place and it provides the potenial difference .
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In a cell or battery energy transformation is chemical energy to electrical energy.its a sealed container inside it contains chemicals like carbon and manganese hydroxide and have two mettalic terminals +ve and _veterminals.when a mettalic conductor  is connected between these terminals,there is a change in potential take place and an emf is formed.here the current formed is named as direct current
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