Questions
For protecting a sensitive equipment from the external magnetic field, it should be
a
Placed inside an aluminium case
b
placed inside an iron case
c
Wrapped with insulation around it when passing current through it
d
Surrounded with fine copper sheet.
detailed solution
Correct option is B
Concept of magnetic screening/shielding:When a soft iron ring is placed in magnetic field, then most of the field lines pass through the ring and no the field lines pass through the space inside the ring. This phenomenon is called magnetic screening.Talk to our academic expert!
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The S.I. unit of magnetic permeability is
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