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Question

Which of the following is not showing the essential difference between electrostatic shielding by a conducting shell and magnetostatic shielding?

A
Electrostatic field lines can end on charges and conductors have free charges.
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B
Magnetic field lines can end but conductors cannot end them.
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C
Lines of magnetic field cannot end on any material and perfect shielding is not possible.
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D
Shells of high permeability materials can be used to divert lines of magnetic field from the interior region.
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Solution

The correct option is A Magnetic field lines can end but conductors cannot end them.
Electrostatic shielding is the phenomenon to block the effects of an electric field. the conducting shell can block the effects of an external field on its internal content or the effect of an internal field on the outside environment. For protecting a sensitive equipment from the external magnetic field it should be placed inside an iron cane (magnetic shielding). Magnetostatic shielding is done by using an enclosure made of a high permeability magnetic material to prevent a static magnetic field outside the enclosure from reaching objects inside it or to confine a magnetic field within the enclosure.

So Statement B is wrong. Hence correct option is B

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