an iron cuboid of dimension of 40 cm, 2 cm & 2cm. Find its all possible resistance if the electric conductivity of iron 10^7.
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Answer:
R=
A
ρl
Area =(0.1)
2
dR=
0.01
Sdx
∫dR=100S∫
0
0.1
dx
R=100S(0.1)
R=10S
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