How does the magnetic field produced by a current-carrying wire change with distance from the wire?

Question

How does the magnetic field produced by a current-carrying wire change with distance from the wire? — Exam MCQ

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C. It decreases as distance increases — The correct choice is It decreases as distance increases. The result follows from the relevant magnetic-field, electromagnetic-induction or Fleming/right-hand-rule principle.

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A. It remains constant at all distances

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B. It fluctuates randomly with distance

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D. It increases as distance increases

How does the magnetic field produced by a current-carrying wire change with distance from the wire?

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