a resistance of 5 ohm is drawn out so that new lenth is twice the original length.what is the new resistance?
Asked by lakshay | 27th Apr, 2012, 06:50: PM
Expert Answer:
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
Answered by | 30th Apr, 2012, 10:43: AM
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