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A series battery of 6 lead accumulators,...

A series battery of 6 lead accumulators, each of emf 2.0V and internal resistance 0.25`Omega` is charged by a 230V d.c. mains to limit the charging current, a series resistance of `53Omega` is used in the charging circuit. What is (i) power supplied by the mains (ii) power dissipated as heat? Account for the difference in the two cases.

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