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Physics
Physics
Problem
Space between two concentric conducting spheres of radii
a
a
a
and
b
b
b
(
b
>
a
b > a
b
>
a
) is filled with a medium of resistivity
ρ
\rho
ρ
. The resistance between the two spheres will be : a.
ρ
4
π
(
1
a
−
1
b
)
\frac{\rho}{4\pi} \left( \frac{1}{a} - \frac{1}{b} \right)
4
π
ρ
(
a
1
−
b
1
)
b.
ρ
2
π
(
1
a
−
1
b
)
\frac{\rho}{2\pi} \left( \frac{1}{a} - \frac{1}{b} \right)
2
π
ρ
(
a
1
−
b
1
)
c.
ρ
2
π
(
1
a
+
1
b
)
\frac{\rho}{2\pi} \left( \frac{1}{a} + \frac{1}{b} \right)
2
π
ρ
(
a
1
+
b
1
)
d.
ρ
4
π
(
1
a
+
1
b
)
\frac{\rho}{4\pi} \left( \frac{1}{a} + \frac{1}{b} \right)
4
π
ρ
(
a
1
+
b
1
)
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