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Solution


Q.

The incorrect relation for a diamagnetic material (all the symbols carry their usual meanings and ε is a small positive number) is                       [2024]
1 μ<μ0  
2 0≤μr<1  
3 -1≤χ<0  
4 1<μr<1+ε  

Ans.

(4)

The relative magnetic permeability of diamagnetic material is slightly less than 1. So, the option 1<μr<1+ε is incorrect.