Free online course Magnets, Magnetism and Charges

About the free online course

Build a clear, practical understanding of magnetism and electric charge with this free online physics course designed for school-level learners who want more than memorizing formulas. You will connect the everyday behavior of magnets to the invisible fields that explain why they attract, repel, and interact with materials. Step by step, the course helps you translate core ideas into confident problem solving, so you can approach physics questions with a method instead of guesswork.

As you progress, you will learn how electric current creates magnetic fields, how to predict field direction using right-hand rules, and how to calculate field strength at specific distances. These ideas form the foundation for understanding coils and electromagnets, where geometry and current combine to produce stronger, more useful magnetic effects. Along the way, targeted exercises reinforce the reasoning behind each result, helping you spot common traps and develop accuracy with units, powers of ten, and scientific notation.

The course then deepens into magnetic forces, where charged particles and current-carrying wires experience forces in a magnetic field. You will practice determining force direction and magnitude, including the key cases where motion is parallel, perpendicular, or at an angle to the field. This is the physics behind particle paths, the behavior of beams in fields, and many exam problems that hinge on sign conventions and vector thinking.

Finally, you will see how these principles power real devices and measurements, linking magnetism to motors, simple electromagnetic demonstrations, velocity selectors, and mass spectrometers. By the end, you will not only recognize the concepts but also understand how they work together as a coherent system—ideal preparation for tests, homework, or building a stronger foundation for advanced physics.