Definition
A "magnetic field" is a region around a magnet or moving electric charge where a magnetic force is exerted. 🧲 It's invisible but its effects are very real. Compasses align with Earth's magnetic field. 🧭 Magnetic fields are created by moving electric charges, such as in electromagnets. They play a crucial role in many technologies, like electric motors and MRI machines. ✨ Think of it as an invisible web of force.