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If toroid uses bismuth for its core, wil...

If 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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As bismuth is diamagnetic, therefore, the field in the core will be slightly less than when the core is empty.
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-MAGNETISM AND MATTER-Additional Exercises
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  2. Why is diamagnetism, in contrast, almost independent of temperature?

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  3. If toroid uses bismuth for its core, will the field in the core be (sl...

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