Which relation is INCORRECT for a diamagnetic material? Symbols have their usual meanings; ε is a small positive number.
Options

Question

Which relation is INCORRECT for a diamagnetic material? Symbols have their usual meanings; ε is a small positive number.

G1 Physics · Accepted Answer

Step 1: For diamagnetic matter, induced magnetisation opposes the applied field; susceptibility χₘ is small and negative. Step 2: Therefore −1 < χₘ < 0 and relative permeability μᵣ = 1 + χₘ lies below unity: 0 < μᵣ < 1. Step 3: The relation implying μᵣ exceeds 1 is incorrect for a diamagnet. Final: option D. Final answer: (D) 1 < μᵣ < 1 + ε.