Essential difference between electrostatic shielding by a conductin...

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Essential difference between electrostatic shielding by a conducting shell and magnetostatic shielding is due to
\( \mathrm{P} \)
(a) electrostatic field lines can end on charges and conductors have
W free charges.
(b) lines of \( \mathbf{B} \) can also end but conductors cannot end them.
(c) lines of \( \mathbf{B} \) cannot end on any material and perfect shielding is not possible.
(d) shells of high permeability materials can be used to divert lines of \( \mathbf{B} \) from the interior region.
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