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A perfectily diamagnetic sphere has a sm...

A perfectily diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagentic substance. The whole system is places in a uniform magnetic field `vecB` Then the field inside the paramagnetic substance is

A

much larger than `|vecB|` but opposite to `vecB`

B

much larger than `|vecB|` but parallel to `vecB`

C

zero

D

`vecB`

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