Why Your Phone's Motor and Power Plant Use Different Hands
AI-generated illustrated lesson. Hand-drawn and narrated, step by step.
Draw the magnetic field lines around a straight conductor and around a solenoid, then illustrate Fleming's…
In 1820, a scientist named Hans Christian Ørsted noticed a glitch in reality: turning on an electric wire made a nearby compass twitch. Electricity was somehow creating magnetism.
If we zoom in on a straight wire, the magnetic field doesn't just radiate outwards. It forms perfect, invisible concentric rings spinning around the current.
To predict which way these rings spin, you don't need complex math—just your right hand. Point your thumb with the current, and your fingers naturally curl in the direction of the magnetic field.
Premium unlocks the full lesson — watch it in My Magic Pencil.