[" 0.A cylindrical rod is reformed to ha...

[" 0.A cylindrical rod is reformed to half of its original length "],[" keeping volume constant.If its resistance before this "],[" change were "R," then the resistance after reformation of "],[" rod will be "],[[" (a) "R," (b) "R/4],[" (c) "3R/4," (d) "R/2]]

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[" 0.A cylindrical rod is reformed to half of its original length "],[" keeping volume constant.If its resistance before this "],[" change were "R," then the resistance after reformation of "],[" rod will be "],[[" (a) "R," (b) "R/4],[" (c) "3R/4," (d) "R/2]]

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