[" (c) "2],[" 6.A force "F" is needed to...

[" (c) "2],[" 6.A force "F" is needed to break a copper wire having radius "],[R" .The force needed to break a copper wire of same length "],[" and radius "2R" will be "],[[" (a) "F/2," (b) "2F],[" (c) "4F," (d) "F/4]]

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[" (c) "2],[" 6.A force "F" is needed to break a copper wire having radius "],[R" .The force needed to break a copper wire of same length "],[" and radius "2R" will be "],[[" (a) "F/2," (b) "2F],[" (c) "4F," (d) "F/4]]

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