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If a toroid uses bismuth for its core, w...

If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is empty?

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Bismuth is a diamagnetic material. So, it will show slightly less magnetic field in the core than that of an empty core.
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Answer the following questions: (a) Why does a paramagnetic sample display greater magnetization (for the same magnetizing field) when cooled. (b) Why is diamagnetism, in contrast, almost independent of temperature? (c) If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is empty? (d) Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields? (e) Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point). Why? (f) Would the maximum possible magnetization of a paramagnetic sample be of the same order of magnitude as the magnetization of a ferromagnet?

A: If a toroid uses bismuth for its core, then the field in the core will be slightly less than when the core is empty. R: Bismuth is paramagnetic.

A toroid has a core of inner radius 20cm and outer radius 22cm around which 4200 turns of a wire are wound. If the current in the wire is 10A , what is the magnetic field (a) inside the core of toroid (b) outside the toroid (c) in the empty space surrounded by toroid?

A toroid has a core (non ferromagnetic material) of inner radius 25cm and outer radius 26cm around which 3500 turns of wire are wound. If the current in the wire is 11A , what is the magnetic field (a) outside the toroid (b) inside the core of the toroid (c) in the empty space surrounded by the toroid?

The diameter of the outer conductor of a cylindrical capacitor is D_2 • What should the diameter of the core, D_1 , of this capacitor be so that for a given potential difference between the outer conductor and the core the electric field strength at the core is minimal ?

MODERN PUBLICATION-MAGNETISM AND MATTER-NCERT FILE (ADDITIONAL EXERCISE)
  1. Why is diamagnetism, in contrast, almost independent of temperature?

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  2. If a toroid uses bismuth for its core, will the field in the core be (...

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  3. Is the permeability of a ferromagnetic material independent of the mag...

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  4. Magnetic field lines are always nearly normal to the surface of a ferr...

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  5. Would the maximum possible magnetization of a paramagnetic sample be o...

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  6. Explain qualitatively on the basis of a domain picture the irreversibi...

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  7. The hysteresis loop of a soft iron piece has a much smaller area than ...

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  8. A system displaying a hysterisis loop such as a ferromagnet, is a devi...

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  9. What kind of a ferromagnetic material is used for coating magnetic tap...

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  10. A certain region of space is to be shielded from magnetic fields. Sugg...

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  11. A long straight horizontal cable carries a current of 2.5amp. In the d...

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  12. A telephone cable at a place has four long straight horizontal wires c...

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  13. A compass needle free to turn in a horizontal plane is placed at the c...

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  14. A magnetic dipole is under the influence of two magnetic fields. The a...

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  15. A monoenergetic (18 keV) electron beam initially in the horizontal dir...

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  16. A sample of a paramagnetic salt contains 2.0 xx 10^(24) atomic dipoles...

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  17. A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ...

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  18. The magnetic moment vectors vecmus and vecmul associated with the intr...

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