There are two concentric spheres of radius a and b respectively. If the space between them is filled with medium of resistivity `rho`, then the resistance of the intergap between the two spheres will be (Assume `bgta`)

Explanation

To find the resistance of the intergap between two concentric spheres of radius \( a \) and \( b \) (where \( b > a \)) filled with a medium of resistivity \( \rho \), we can follow these steps:

### Step 1: Understand the Geometry
We have two concentric spheres with radii \( a \) and \( b \). The space between them is filled with a medium of resistivity \( \rho \). We need to calculate the resistance of the spherical shell formed between these two spheres.

### Step 2: Consider a Thin Spherical Shell
Consider a thin spherical shell at a distance \( x \) from the center, with thickness \( dx \). The radius of this shell is \( x \).

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