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Permeability $\mu$ of a ferromagnetic substance- (a) $\mu>>1$ (B) $\mu=1$ (C) $\mu
Permeability $\mu$ of a ferromagnetic substance- (a) $\mu>>1$ (B) $\mu=1$ (C) $\mu<1$ (D) $\mu=0$
Maths | Previous Year Question Papers
Permeability $\mu$ of a ferromagnetic substance- (a) $\mu>>1$ (B) $\mu=1$ (C) $\mu<1$ (D) $\mu=0$

Answer: Option (A)$\mu>>1$

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At a certain location in Africa, a compass points $12^{\circ}$ west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points above the horizontal. The horizontal component of the earth’s field is measured to be $0.16 \mathrm{G} .$ Specify the direction and magnitude of the earth’s field at the location.At a certain location in Africa, a compass points $12^{\circ}$ west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points above the horizontal. The horizontal component of the earth’s field is measured to be $0.16 \mathrm{G} .$ Specify the direction and magnitude of the earth’s field at the location.