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(c) Must every magnetic configuration ha...

(c) Must every magnetic configuration have a north pole and a south pole ? What about the field due to a toroid ?

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(c) It is not necessary that every magnetic configuration should have north pole and south pole. If the source of magnetic field has some net magnetic moment then only it has magnetic north pole and magnetic south pole, otherwise not. For example : toroid, current carrying ring, infinitely long current carrying straight thin wire do not possess magnetic north pole and magnetic south pole.
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KUMAR PRAKASHAN-MAGNETISM AND MATTER-SECTION B Numericals (Numerical From Textual Illustrations)
  1. In Fig 5.4 (b), the magnetic needle has magnetic moment 6.7 xx 10^(-2)...

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  2. A short bar magnet placed with its axis at 30° with an external field ...

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  3. (a) What happens if a bar magnet is cut into two pieces: (i) transvers...

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  4. (b) A magnetised needle in a uniform magnetic field experiences a torq...

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  5. (c) Must every magnetic configuration have a north pole and a south po...

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  6. (d) Two identical looking iron bars A and B are given, one of which is...

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  8. Figure shows a small magnetised needle P placed at a point 0. The arro...

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  9. Many of the diagrams given in Fig 5.7 show magnetic field lines (thick...

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  10. (a) Magnetic field lines show the direction (at every point) along whi...

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  11. (b) Magnetic field lines can be entirely confined within the core of a...

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  12. (c) If magnetic monopoles existed, how would the Gauss's law of magnet...

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  13. Does a bar magnet exert a torque on itself due to its own field '? Doe...

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  14. Magnetic field arises due to charges in motion. Can a system have magn...

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  15. The earth magnetic field at the equator is approximately 04.G. Estimat...

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  16. In the magnetic meridian of a certain place, the horizontal component ...

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  17. A solenoid has a core of a material with relative permeability 400. Th...

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  18. A domain in ferromagnetic iron is in the form of a cube of side length...

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