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A loop of irregular shape carrying current is located in an external magnetic field. If the wire is flexible, why does it change to a circular shape?

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To solve the question of why a flexible loop of irregular shape carrying current changes to a circular shape when placed in an external magnetic field, we can follow these steps: ### Step 1: Understanding Magnetic Flux Magnetic flux (Φ) through a loop is defined as the product of the magnetic field (B) and the area (A) of the loop perpendicular to the field: \[ \Phi = B \cdot A \cdot \cos(\theta) \] Where θ is the angle between the magnetic field lines and the normal to the surface of the loop. ### Step 2: Maximizing Magnetic Flux ...
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