Answered: 4. An infinitely long wire has been… | bartleby

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**Problem Description:**

4. An infinitely long wire has been bent into the hairpin-like shape shown below. The curved part of the wire is a semicircle of radius \( R \). Point \( P \) is the center of the semicircle. The wire carries a current \( I \) in the direction indicated by the purple arrows.

**Diagram Explanation:**

The diagram shows a wire formed into a shape resembling a hairpin.

- **Semicircle**: The wire's curved part is a semicircle, with the point \( P \) marked at its center. The radius of this semicircle is labeled \( R \).
- **Current Flow**: The current \( I \) is denoted by purple arrows. It flows along the wire, starting from the left side, moving through the semicircle, and then continuing along the bottom side.

**Task:**

Find the magnetic field at point \( P \).

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