A straight wire of length 0.80 m carrying a current of 5.0 A is placed at an angle of 30° to a uniform magnetic field of 0.40 T. What magnetic force acts on the wire?
Answer and explanation
Correct answer: C. 0.80 N
- Step 1: Apply the magnetic force formula on a current-carrying wire: .
- Step 2: Substitute: .
Answer
0.80 N.
Why not the others: 1.6 N neglects ; 1.38 N mistakenly uses ; 0.40 N halves the current.
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