3 metal rods of same length and same section having same conducted 123 units are counted in series then their effective conductivity will be
Answer (1)
30th Jul, 2020
Dear candidates,
Givern
Three Rods having same length and same area
K = 1 , K = 2 , K = 3
we have
Reff = R1 + R2 + R3
R = L/KA
3L/A*Keff = L/1*A + L/2*A + L/3*A
so L/ A will be cancel
we get
3/keff = 1 + 1/2 + 1/3
3/keff = 6+ 3 + 2 / 6
3/keff = 11/6
keff = 18/11 = 1.6
Hope this helps!!
All the Best!!
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