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[" A wire of length "L" and "3" identica...

[" A wire of length "L" and "3" identical cells of negligible internal "],[" resistances are connected in series.Due to the current,the "],[" temperature of the wire is raised by "Delta T" in a time "t" .A number "],[" Nof similar cells is now connected in series with a wire of the "],[" same material and cross-section but of length "2L." The "],[" temperature of the wire is raised by the same amount "Delta T" in "],[" the same time.The value of "N" is "],[[" (a) "4," (b) "6," (c) "8," (d) "9]]

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