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  4. A sensitive magnetic instrument can be shielded very effectively from outside fields by placing it inside a box of

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Q. A sensitive magnetic instrument can be shielded very effectively from outside fields by placing it inside a box of

Rajasthan PMTRajasthan PMT 2007Magnetism and Matter

Solution:

To shield a sensitive magnetic instrument from outside fields, it should be placed inside a box of soft iron of high permeability, because soft iron box with high permeability will next allow magnetic lines to enter inside the box.