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Question

What are magnetic field lines? How is the direction of magnetic field at a point in a magnetic field determined using field lines?

Solution
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A magnetic field line is the path along which a free north-pole tends to move. The direction of a magnetic field at a point is determined by placing a small compass needle. The N - pole of compass indicates the direction of magnetic field at that point.

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Q1
What are magnetic field lines? How is the direction of magnetic field at a point in a magnetic field determined using field lines?
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Q2
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