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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Magnetic field lines show the direction (at every point) along which a small magnetised needle aligns (at the point). Do the magnetic field lines also represent the lines of force on a moving charged particle at every

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If magnetic monopoles existed, how would the Gauss’s law of magnetism be

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Does a bar magnet exert a torque on itself due to its own field? Does one element of a current-carrying wire exert a force on another element of the same

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Magnetic field arises due to charges in motion. Can a system have magnetic moments even though its net charge is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The earth’s magnetic field at the equator is approximately 0.4 G. Estimate the earth’s dipole

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In the magnetic meridian of a certain place, the horizontal component of the earth’s magnetic field is 0.26G and the dip angle is 60°. What is the magnetic field of the earth at this

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A solenoid has a core of a material with relative permeability 400. The windings of the solenoid are insulated from the core and carry a current of 2A. If the number of turns is 1000 per metre, calculate(i) H,(ii) M,(iii) B (iv) the magnetising current Im

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A domain in ferromagnetic iron is in the form of a cube of side length 1µm. Estimate the number of iron atoms in the domain and the maximum possible dipole moment and magnetisation of the domain. The molecular mass of iron is 55 g/mole and its density is 7.9 g/cm3 . Assume that each iron atom has a dipole moment of 9.27×10–24 A

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions regarding earth’s magnetism: A vector needs three quantities for its specification. Name the three independent quantities conventionally used to specify the earth’s magnetic

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions regarding earth’s magnetism: The angle of dip at a location in southern India is about 18°. Would you expect a greater or smaller dip angle in

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions regarding earth’s magnetism: If you made a map of magnetic field lines at Melbourne in Australia, would the lines seem to go into the ground or come out of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions regarding earth’s magnetism: In which direction would a compass free to move in the vertical plane point to, if located right on the geomagnetic north or south

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions regarding earth’s magnetism: The earth’s field, it is claimed, roughly approximates the field due to a dipole of magnetic moment 8 × 1022 J T–1 located at its centre. Check the order of magnitude of this number in some

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions regarding earth’s magnetism: Geologists claim that besides the main magnetic N-S poles, there are several local poles on the earth’s surface oriented in different directions. How is such a thing possible at

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the earth’s magnetism.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: The charged currents in the outer conducting regions of the earth’s core are thought to be responsible for earth’s magnetism. What might be the ‘battery’ (i.e., the source of energy) to sustain these

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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