JEE Main · 2026 · 24 Jan 2026 · Shift 1 · Chapter_pending

Magnetic induction from $F=qvB$ has $[B]=\frac{[F]}{[q][v]}=\frac{\mathrm{ML}{\mathrm{T}}^{-2}}{(\mathrm{AT})(\mathrm{L}{\mathrm{T}}^{-1})}=\mathrm{M}{\mathrm{L}}^0{\mathrm{T}}^{-2}{\mathrm{A}}^{-1}$, which matches III. Magnetic flux $\varphi =BA$ has $[\varphi ]=\mathrm{M}{\mathrm{L}}^2{\mathrm{T}}^{-2}{\mathrm{A}}^{-1}$, matching IV. Magnetic permeability has $[\mu ]=\mathrm{ML}{\mathrm{T}}^{-2}{\mathrm{A}}^{-2}$, matching I. Self-inductance from $U=\frac{1}{2}L{I}^2$ has $[L]=\frac{\mathrm{M}{\mathrm{L}}^2{\mathrm{T}}^{-2}}{{\mathrm{A}}^2}=\mathrm{M}{\mathrm{L}}^2{\mathrm{T}}^{-2}{\mathrm{A}}^{-2}$, matching II. The correct matching is A-III, B-IV, C-I, D-II.