Oersted's experiment
Magnetic field and forces · Physics
DC circuit
Interactive 3DElectrons drift around the loop — raise the voltage and watch the current obey Ohm's law.
Controls
Drag the sliders or type a value — the simulation updates live.
V
1V12V
Study notes
A 6 V battery across a 10 Ω resistor drives I = V/R = 0.6 A. Double the voltage to 12 V and the current doubles to 1.2 A — Ohm's law is linear. The power dissipated as heat is P = V·I = 7.2 W, which is why the resistor in the simulator warms the idea up: raise the voltage slider and watch the electrons speed up.
Related topics
- Biot–Savart law and applications (circular loop, straight wire)
- Ampere's circuital law and applications (solenoid, toroid, wire)
- Magnetic field due to moving charges
- Force on a current-carrying conductor in magnetic field
- Force between two parallel current-carrying wires
- Torque on a current loop in magnetic field