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A 2 m wire carries 7 A perpendicular to a 0.7 T field. What magnetic force acts on it?

By /

A) 4.9 N

B) 14.7 N

C) 9.8 N

D) 19.6 N

Answer: C

Explanation: Use magnetic force = field × current × length at 90° for the stated idealized conditions. Substitution gives 0.7 × 7 × 2 = 9.8 N.

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