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Statement of a problem № 3767

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A certain circuit consists of three resistors connected in parallel across 200 V mains. The rate of production of heat in them is in the ratio of 5:3:2 and together they generate heat at the rate of 1 kW h in 2 h. Find the power used if the three resistances are connected in series across 248 V mains.

Solution:
A certain circuit consists of three resistors connected in parallel across 200 V

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