JAMB Physics 2025 Objective — Question 36
Question 36 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2025 Objective paper, with the correct answer and a full explanation.
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A current of 2 A flows through a wire 0.4 m long in a field of 0.5 T (perpendicular). The force on the wire is:
- A. 0.2 N
- B. 0.8 N
- C. 0.4 NCorrect
- D. 1.0 N
Explanation
F=BIL sin90°=0.5×2×0.4=0.4 N.
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