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1.A wire of length L and resistance R is stretched so that itslength is doubled and area of cross section is halved. How willits (i) resistance change? (ii) resistivity change? |
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Answer» i) The Resistance Will increase by 4ii) There Will be no change in resistivity because resistivity does not depend on leng th and area of cross section. Resistance=resistivity*length/areahence if length is doubled are area halvedresistance will become 4 timesand resistivity will become 1/4th times |
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