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Describe the construction,working and usefulness of a dry cell |
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Answer» A dry cell consists of a ZINC container whose base acts as the negative electrode. The carbon rod placed at the centre with a BRASS cap acts as the positive electrode. This is surrounded by a mixture of manganese DIOXIDE and charcoal in a muslin bag. The electrolyte USES is a moist paste of AMMONIUM chloride. The outer body (excluding the base) of the zinc container is insulated with cardboard. When the dry cell is connected in a circuit comprising a bulb, current flows in the circuit due to the chemical reaction that takes place in the cell. This makes the bulb glow. The dry cell is a primary cell and it cannot be recharged. |
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