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[" The power of a heater is "500W" at "8...

[" The power of a heater is "500W" at "800^(@)C" what will be its power at "200^(@)C" .If "alpha=4times10^(-4)/C^(@)],[[" 1) "500W," 2) "611W," 3) "600W," 4) "800W]]

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