The statement which is true about magnetic domain is magnetic domains must come in pairs one north one south.
What are electric charges?
Electric charges within any molecule are generated due to presence of a possitive end and negative end.
In magnetic domain of any substance, one north pole and one south pole is present and mangetic lines will travel from north to south direction within the substance.
And in electrical domain, electric charge will move from negative end to positive end and electricity will flow from positive end to negative end. But these charge are present separately, not in pair form.
Hence, option (C) is correct.
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