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    Question

    Which of the following statements about magnetic field lines is correct?

    A Magnetic fields possess only direction. Correct Answer Incorrect Answer
    B The strength of the magnetic field is indicated by the number of intersections of field lines. Correct Answer Incorrect Answer
    C Magnetic field lines never intersect each other. Correct Answer Incorrect Answer
    D By convention, magnetic field lines originate from the south pole and terminate at the north pole of a bar magnet. Correct Answer Incorrect Answer

    Solution

    Magnetic field lines are a visual representation of the magnetic field. They have both magnitude and direction. The relative strength of the magnetic field is shown by the closeness of the field lines, not their intersections. If two magnetic field lines were to cross, it would imply two directions at a single point, which is impossible. Field lines conventionally emerge from the north pole and merge at the south pole of a bar magnet.

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