Magnetisation and BHardQuestion 20231
Question
Inside a magnetic material, the relationship between B, H, and magnetisation M is:
- AB = μ₀H
- BB = μ₀(H + M)Correct
- CB = μ₀(H − M)
- DB = H + μ₀M
Correct answer
B = μ₀(H + M)
Explanation
B = μ₀(H + M). For vacuum M = 0 so B = μ₀H. Inside a magnetic material, M is the magnetisation (magnetic moment per unit volume) and adds to the external H field.