A short magnet of length 4 cm is kept at...

A short magnet of length 4 cm is kept at a distance of 20 cm to the east of a compass box such that is axis is perpendicular to the magnetic meridian. If the deflection produced is `45^(@)`, find the pole strength `(H = 30 Am^(1))`

`17.7 Am`

`44.2Am`

`27.7Am`

`37.7Am`

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