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Faraday's Law Lab

Electromagnetic Induction & Lenz's Law — Interactive Simulation

⟨ drag the magnet ⟩

Magnetic Flux Φ(t)Webers

Induced EMF ε(t) = −N·dΦ/dtVolts

Live Telemetry

Magnetic Flux Φ0.0000 Wb

Induced EMF ε0.000 V

Drag Speed0 px/s

Bulb Brightness

ε = −N · dΦ/dt

Faraday's Law

Φ = B · A · cos θ

Magnetic Flux

Lenz: F = −ΔΦ

Opposition Principle

💡Magnet Far Away

When the magnet is distant, the flux through the coil is negligible. Move the magnet toward the coil to induce an EMF and light the bulb.

🎯 Challenge Mode

Select a wave pattern, then drag the magnet to match the EMF graph.