A long wire carrying a current i is bent to form a plane angle alpha`. `Find the magnetic field B at a point on the bisector of this angle situated at a distance x from the vertex. `

Explanation

To solve the problem of finding the magnetic field \( B \) at a point on the bisector of a plane angle \( \alpha \) formed by a long wire carrying a current \( I \), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Geometry**:
- We have a long wire bent to form a plane angle \( \alpha \).
- Let the vertex of the angle be point \( O \) and the two arms of the wire extend infinitely.
- The bisector of the angle \( \alpha \) meets at point \( P \), which is at a distance \( x \) from the vertex \( O \).
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