# Illustration 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.