The resistance of the conductor is R. If its length is doubled, then its new resistance will be?

The resistance of the conductor is R. If its length is doubled, then i

1.	The resistance of the conductor is R. If its length is doubled, then its new resistance will be?
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.???