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#10 | Earth's Magnetism

(Physics) > Magnetism and Matter

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A bar magnet of length 3 *cm* has points *A *and *B* along its axis at distances of 24 *cm* and 48 *cm* on the opposite sides. Ratio of magnetic fields at these points will be

(a) 8 (b)$\frac{1}{2\sqrt{2}}$

(c) 3 (d) 4

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If the angles of dip at two places are 30^{o} and 45^{o }respectively, then the ratio of horizontal components of earth's magnetic field at the two places will be

(a) $\sqrt{3}:\sqrt{2}$ (b) $1:\sqrt{2}$

(c) $1:\sqrt{3}$ (d) 1:2

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A line passing through places having zero value of magnetic dip is called

(a) Isoclinic line (b) Agonic line

(c) Isogonic line (d) Aclinic line

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