Question
Fri April 27, 2012 By: Lakshay
 

a resistance of 5 ohm is drawn out so that new lenth is twice the original length.what is the new resistance?

Expert Reply
Mon April 30, 2012
Length got doubled 
 
pi (r12) l1 = pi (r22) l2
 
(r12) /  (r22) = 2
 
(r22) = (r12) /2
 
So resiatnace will be 4 times & it will be 5 * 4 = 20 ohms
 
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