Question

# A straight vertical wire carries a current of 1.20 A downward in a region b/t the poles of a large superconducting electromagnet,where the magnetic fi

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According to the solutions, the force stays the same for parts $$\displaystyle{a},{b},{c}:{F}={I}\cdot{l}\cdot{B}={7.06}\times{10}^{{-{3}}}$$ but for part c,why isn't the 30 degree angle used to calculate the force?