Visualization of electric fields and force lines
The force of interaction between two charges is inversely proportional to the square of the distance between them.
k ≈ 9×10⁹ N·m²/C² — Coulomb constant.
Electric field lines show the direction of force that acts on a positive test charge.
🔴 Lines extend from positive charges
🔵 Lines enter negative charges
Electric field strength is the force per unit charge. Measured in V/m (volts per meter).
🖨️ Laser printer: Static electricity for transferring toner
⚡ Lightning: Discharge between a cloud and the ground
📱 Touchscreens: Capacitive sensors
🏭 Electrofilters: Air purification