Magnetic field due to currentHard
Question
The magnetic susceptibility of an ideal diamagnetic substance is
Options
A.-1
B.0
C.+1
D.∞
Solution
Magnetic susceptibility χ is related to permeability μ by μ = 1 + 4×χm : For dimagnetic subatances χm is negative and μ < 1 (negative). Ideal diamagnet should expel all magnetic field lines inside it i.e., χm < 0 or χm = - 1
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