Electricity & Magnetism
Electric fields, circuits, Ohm's law, and electromagnetic induction
Electric Field Visualizer
Place charges and watch field lines update in real time.
Electric Potential
2D heatmap V = Σ kq/r. Drag charges, see equipotential colors.
Coulomb's Law
Two charges with adjustable magnitude and distance. Force vectors shown.
Particle in E and B Fields
Lorentz force: cyclotron motion, E×B drift, trajectories in sim units.
Circuit Builder
Drag and drop components: battery, resistor, bulb, switch. See current flow.
Ohm's Law
Adjust voltage and resistance. See current change with interactive V-I graph.
Series & Parallel
Compare total resistance and current distribution side by side.
RC Circuit
Charging and discharging capacitor with exponential curves.
RLC Series (AC)
Resonance peak, |Z|, phase. I(f) curve and live V & I waves.
Resistor Color Code
Click bands to see resistance, or enter value to see bands.
Magnetic Field
Bar magnets and current-carrying wires with field line visualization.
Electromagnetic Induction
Move magnet through coil. Faraday's law visualized.
Ideal Transformer
U₂/U₁ = N₂/N₁. Optional load R for I₁, I₂ (ideal power).