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प्रश्न
Choose the correct option.
Let r be the distance of a point on the axis of a bar magnet from its center. The magnetic field at r is always proportional to
विकल्प
`1/"r"^2`
`1/"r"^3`
`1/"r"`
not necessarily `1/"r"^3` at all points
MCQ
उत्तर
not necessarily `bb(1/"r"^3)` at all points.
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Magnetic Lines of Force and Magnetic Field
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