Question

# For diamagnetic materials, magnetic susceptibility is

A
Small and negative
B
Small and positive
C
Large and negative
D
Large and positive
Solution
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#### The correct option is A Small and negativeDiamagnetic materials create an induced magnetic field in a direction opposite to an external applied magnetic field and are repelled by applied magnetic field.Magnetic permeability of the diamagnetic materials is little less than unity.∴ μr=(1+χm)<1⟹ χm<0Thus magnetic susceptibility of diamagnetic materials is very small and negative.For example : For Silicon, χm= −4.2×10−6

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