magnetism

Related Questions

• Two bar magnets with magnetic moments $2 M$ and $M$ are fastened together at right angles to each other at their centres to form a crossed system, which can rotate freely about a vertical axis through the centre. The crossed system sets in earth’s magnetic field with magnet having magnetic moment $2M$ making and angle $\theta$ with the magnetic meridian such that

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• For an isotropic medium B, ?, H and M are related as (where $B,\,\,{\mu _0},\,\,H$ and M have their usual meaning in the context of magnetic material

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

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• The magnetic field due to a short magnet at a point on its axis at distance Xcm from the middle point of the magnet is 200 Gauss. The magnetic field at a point on the neutral axis at a distance Xcm from the middle of the magnet is

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• The radius of the coil of a Tangent galvanometer. which has 10 turns is 0.1m. The current required to produce a deflection of 60° $({B_H} = 4 \times {10^{ - 5}}T)$ is

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