Class 12 · Chapter
Magnetism & Matter
6 topics · 6 interactive simulations
🧲
Bar Magnet & Dipole Field
Magnetic moment m = pole-strength × 2ℓ; field lines emerge from N, end at S.
Foundation8 minlive
📐
Axial vs Equatorial Field
B_axial = (μ₀/4π)(2m/r³), B_equa = (μ₀/4π)(m/r³). Ratio = 2.
Moderate9 minlive
🌍
Earth's Magnetic Field
Declination, dip angle I, horizontal component H. tan I = 2 tan λ.
Moderate10 minlive
🧮
Magnetization & H, B Relation
M = χH, B = μ₀(H + M), μ_r = 1 + χ. Tune both to see effect.
Advanced10 minlive
🧲
Dia / Para / Ferromagnetic
Dipole alignment under H — dia opposite, para weak parallel, ferro strong.
Moderate9 minlive
🔁
B-H Hysteresis Loop
Soft iron (thin loop, low loss) vs hard steel (fat loop). Coercivity, retentivity.
Advanced11 minlive