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A small current-carrying loop is locate...

A small current-carrying loop is located at a distance `r` from a long straight conductor with current `I`. The magnetic moment of the loop is equal to `p_(m)`. Find the magnitude and direction of the force vector applied to the loop if the vector `p_(m)`
(a) is parallel to the stratight conductor,
(b) is oriented along the radius vector `r`,
(c) coincides in direction with the magnetic field produced by the current `I` the point where the loop is located.

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