If a bar magnet of pole strength 'm' and...

If a bar magnet of pole strength `'m'` and magnetic moment `'M'` is cut equally `5` times parallel to its axis and `4` times perpendicular to its axis then the pole strength and magnetic moment of each piece are respectively

`m/20,M/20`

`m/4,M/20`

`m/5,M/20`

`m/5,M/4`

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