Magnetic Flux
Φ = B·A·cosθ. Tilt the loop and watch flux follow a cosine curve.
Notes coming soon — open the simulation for the live walkthrough.
Class 12 · Notes
Electromagnetic Induction— Notes, Formulas & Revision
Complete revision notes and formulas for Electromagnetic Induction (Class 12). Curated for JEE, NEET, AP Physics, SAT, and CUET. Tap any topic to open the live simulation and full PYQ set.
Faraday's Law
ε = −N·dΦ/dt. Move a magnet near a coil and watch the galvanometer needle.
Notes coming soon — open the simulation for the live walkthrough.
Lenz's Law
Induced current opposes the change in flux — repels approaching magnet, attracts retreating.
Notes coming soon — open the simulation for the live walkthrough.
Motional EMF
ε = BLv. Rod sliding on rails through B field generates current and feels back-force.
Notes coming soon — open the simulation for the live walkthrough.
Induced Electric Field
Changing B induces E circulating around it. E ∝ r inside, ∝ 1/r outside.
Notes coming soon — open the simulation for the live walkthrough.
Self-Inductance & RL Transient
L = μ₀N²A/ℓ. RL circuit current I(t) = I∞(1 − e^(−t/τ)), τ = L/R.
Notes coming soon — open the simulation for the live walkthrough.
Mutual Inductance
Two coupled coils. M = μ₀N₁N₂A/ℓ. ε₂ = −M·dI₁/dt with 90° phase shift.
Notes coming soon — open the simulation for the live walkthrough.
Eddy Currents (Magnetic Braking)
Solid plate damps quickly in B; slotted plate barely damps. Lenz dissipation.
Notes coming soon — open the simulation for the live walkthrough.
Electromagnetic Induction on sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs). Free physics revision for Class 12, JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT Subject Physics, and CUET-UG.