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Illustration Rectangular Current Loop in a Magnetic Field

Rectangular Current Loop in a Magnetic Field
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A rectangular conducting loop with current \(I\) flowing through it is in an external homogeneous magnetic field \(B\). Two opposite sides of the loop have length \(b\) and the other two sides of the conductor, which are parallel to the axis of rotation \(\text{C}\), have length \(a\).

Due to the circulating current, the loop represents a magnetic dipole, which has a magnetic dipole moment \(\mu\). The dipole interacts with the external magnetic field in such a way that the conductor loop rotates until \(\mu\) and \(B\) vectors are parallel.