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With zero integration constant, U = 0 at which needle orientation?
AParallel to the field
BOpposite to the field
CTilted at 45 degrees
DPerpendicular to field
Answer & Solution
Correct answer: D. Perpendicular to field
With U = -mB cos(theta) and zero constant, U is zero at theta = 90 degrees, when the needle is perpendicular to B.
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