A sensitive magnetic instrument can be shielded very effectively from an outside field by placing it inside a box of -------

Options :
  1. teak wood
  2. plastic material
  3. soft iron of high permeability
  4. metal of high conductivity
Answer and Explanation :-

Answer: Option 3


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More questions and answers on Indian History :-

Trust in someone means that we no longer have to protect ourselves. We believe we will not be hurt or harmed by the other, at least not deliberately. We trust his or her good intentions, though we know we might be hurt by the way circumstances play out between us. We might say that hurt happens it's a given of life. Harm is inflicted it's a choice some people make.
-David Richo