The intensity of a magnetic field is defined as the force experienced by a

standard compass

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unit positive charge

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unit negative charge

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unit north pole

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Solution

The correct option is D unit north pole
Intensity of magnetic field is a force experienced by a unit north pole placed at a point in a magnetic field around a magnet or a current carrying conductor or coil.(unit north pole = having pole strength of unity)
$H = \frac{F}{m}$
where $F =$ force
$m =$ pole strength

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The intensity of a magnetic field is defined as the force experienced by a

The correct option is D unit north poleIntensity of magnetic field is a force experienced by a unit north pole placed at a point in a magnetic field around a magnet or a current carrying conductor or coil.(unit north pole = having pole strength of unity) H=Fmwhere F=forcem= pole strength