Essential difference between electrostatic

Question:

Essential difference between electrostatic shielding by a conducting shell and magneto static shielding is due to

(a) electrostatic field lines can end on charges and conductors have free charges

(b) lines of B can also end but conductors cannot end them

(c) lines of 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 B from the interior region

Solution:

(a) electrostatic field lines can end on charges and conductors have free charges

(c) lines of 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 B from the interior region

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