What is a secondary cell? Name one such cell.
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Secondary cells or accumulators also provide current as a result of a chemical reaction. In these cells, the chemical reaction is reversible and so they can be recharged after use. e.g., Lead accumulator.
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What is the function of a key (or switch) in an electric circuit?
What is a primary cell? Name two such cells.
What are conductors and insulators of electricity? Give two examples of each.
Write the condition required for a circuit to be a closed circuit.