Find the mutual inductance between two coaxial loops of radii R and r (R gtgt r) with separation between the centre x.

Explanation

To find the mutual inductance \( M \) between two coaxial loops of radii \( R \) (larger loop) and \( r \) (smaller loop) with a separation \( x \) between their centers, we can follow these steps:

### Step 1: Understanding the System
We have two coaxial circular loops:
- The larger loop has a radius \( R \).
- The smaller loop has a radius \( r \).
- The distance between the centers of the loops is \( x \).

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