If a toroid uses bismuth for its core, the field in the core compared to that in empty core will be slightly

greater

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smaller

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equal

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None of these

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Solution

The correct option is D smaller
Field in the core with Bismuth will be smaller because bismuth is diamagnetic.

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Q. Answer the following questions:(a) Why does a paramagnetic sample display greater magnetisation(for the same magnetising field) when cooled? (b) Why is diamagnetism, in contrast, almost independent oftemperature? (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 ofthe magnetic field? If not, is it more for lower or higher fields? (e) Magnetic field lines are always nearly normal to the surface of aferromagnet at every point. (This fact is analogous to the staticelectric field lines being normal to the surface of a conductor atevery point.) Why? (f ) Would the maximum possible magnetisation of a paramagneticsample be of the same order of magnitude as the magnetisationof a ferromagnet?

Q. A toroid has a core (nonferromagnetic) of inner radius 25 cm and outer radius 26 cm around which 3500 turns of a wire are wound. If the current in the wire is 11 A, 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.

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

Q. The magnetic field in the core of toroid is

Q. A toroid has

1000 turns

. The inner and outer radii of its core are

15 cm

and

17 cm

respectively. The magnetic field in the centre of core for a current of

0.985 A

1.97 T

. The value of relative permeability of core is.

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If a toroid uses bismuth for its core, the field in the core compared to that in empty core will be slightly

The correct option is D smallerField in the core with Bismuth will be smaller because bismuth is diamagnetic.

The correct option is D smaller
Field in the core with Bismuth will be smaller because bismuth is diamagnetic.