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The resistance of the conductor is R. If its length is doubled, then its new resistance will be? |
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Answer» Original:Resistance = RLength = lArea of cross section = aResistivity = rhoR = rho * l ÷ aNew :Length = 2lArea = a/2R= (rho * 2l ) / a/2R= 2( rho * 2l) /aR= 4 ( rho * l) /aR = 4 times original resistance The new resistance will be 2r , as length and resistance are directly proportional to each other...I guess you must have understoodOk The new resistance will be 2r , as length and resistance are directly proportional to each other...I guess you must have understood... The New resistance will be 2R , BECAUSE Wkt , R directly proportional to length of wire(it is in resistivity relation) so, if L is doubled then the new R will also be double as same.That\'s my answer , it would be wrong,Sorry. New resestance will be 4r.??? |
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