Practice question

Given: A material with susceptibility chi = -3 × 10⁻⁵ has a relative permeability μ_r of: These values define the system as per NCERT data. Formula: μ_r = 1 + chi. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Given: chi = -3 × 10⁻⁵. Substitute: μ_r = 1 - 3 × 10⁻⁵= 0.99997 . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.