A 2 m wire carries 3 A perpendicular to a 0.3 T field. What magnetic force acts on it?

A) 0.9 N

B) 2.7 N

C) 1.8 N

D) 3.6 N

Answer: C

Explanation: Use magnetic force = field × current × length at 90° for the stated idealized conditions. Substitution gives 0.3 × 3 × 2 = 1.8 N.

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