Two long coaxial and conducting cylinders of radius a and b are separated by a material of conductivity σ and a constant potential difference V is maintained between them, by a battery. Then the current, per unit length of the cylinder flowing from one cylinder to the other is -
A
V
B
V
C
V
D
V
Text Solution
Verified by ExpertsThe correct answer is:
C
E = 
where λ is the linear charge density on the inner cylinder.
and V = 
= 
…(1)
Now I = 
= σ 
.2πrdr
Current per unit length will be:
I = 
…(2)
From (1) : I = 
= 
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