Exam-style question
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What happens to the force on a conductor if the current is doubled while keeping the magnetic field strength and length constant?.
- A.The force is halved
- B.The force remains the same
- C.The force is doubled
- D.The force is tripled
Model answer
What a good answer should say
- The force is doubled
Explanation
Why this works
According to the formula F = BIL, if the current (I) is doubled while keeping the magnetic flux density (B) and length (L) constant, the force (F) will also double, since force is directly proportional to current.
Common mistake
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