Simulations
Interactive, watermarked physics demonstrations — pick one to adjust its parameters and run it.
Charged Particle in Electric & Magnetic Fields
INTERSTELLARFire a charged particle into a uniform magnetic field (a closed cyclotron circle), add a uniform electric field (a bending parabola), or combine both to see the guiding center drift sideways — adjust charge sign, mass, speed, and both fields.
Locked — requires Interstellar →
Coulomb's Law
FREERelease a second charge from rest near a fixed one — adjust both charges' sign and size and the starting separation to see it attract or repel exactly as F = kq1q2/r² predicts.
Open simulation →
Cyclotron Motion
LAUNCHFire a charge into a uniform magnetic field, perpendicular to its velocity — adjust the entry speed, field strength, and charge-to-mass ratio to see the radius and period of the resulting circular orbit.
Locked — requires Launch →
Electromagnetic Induction (Faraday's Law)
ORBITSlide a bar magnet through a coil — adjust its speed, the coil's turns, and the magnet's strength to see the induced EMF rise, peak, flip sign as the magnet passes through, and fade as it recedes.
Locked — requires Orbit →
Driven RLC Circuit (LC Resonance)
LAUNCHDrive a series RLC circuit with an AC source — sweep the drive frequency through the resonant frequency and watch the steady-state current amplitude peak, with the peak's sharpness controlled by the circuit's resistance.
Locked — requires Launch →
Lenz's Law (Magnetic Braking)
FREEDrop a bar magnet through a conducting coil — watch the induced current reverse direction between approach and withdrawal, and see the braking force it creates slow the fall, exactly the classic 'magnet through a copper tube' demonstration.
Open simulation →
Ohm's Law (DC Circuit)
FREEClose a simple battery-and-bulb loop — adjust the source voltage and resistance to see the current and power follow Ohm's law exactly, with the bulb brightness and charge-flow dots tracking the result live.
Open simulation →
RC Circuit (Charging & Discharging)
LAUNCHCharge or discharge a capacitor through a resistor — adjust the source voltage, resistance, and capacitance to see the exponential voltage/current curves and the circuit's time constant.
Locked — requires Launch →