Question

19. A magnet 20 cm long with its poles concentrated at its ends is placed vertically with its north pole on the table. At a point 20 cm due to south of the pole a neutral point is located. If horizontal component of the earth's field is H=0.3 gauss, then the pole strength of the magnet is nearly 1) 1.85 amp-m 2) 18.5 ab - amp - cm 3) 185 amp-m 4)185 ab - amp - cm​

Answer 1

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