Free online coursePhysics theory

Course Description

Build a strong foundation in physics and gain the confidence to solve typical exam and homework problems with this free online course designed for basic studies. The lessons guide you step by step through the ideas that connect many areas of class 12 level physics, helping you move from memorizing formulas to truly understanding how physical laws describe real phenomena.

You’ll develop clarity in electrostatics by focusing on charge, electric field, potential and capacitance, then connect those ideas to electric current and circuit reasoning. As you progress, you will see how moving charges lead naturally into magnetism, magnetic materials and the key principles behind electromagnetic induction and alternating current. This emphasis on conceptual links makes the subject feel less like separate chapters and more like one coherent system.

Alongside theory, the course includes plenty of worked examples and practice-style questions to sharpen calculation speed and accuracy. You will learn how to choose the right approach, track units, interpret graphs and avoid common mistakes, whether you’re dealing with field direction, sign conventions, circuit relations or induced emf.

The course also strengthens your understanding of optics, from ray optics and instruments to wave optics, offering intuition for image formation, interference and diffraction. Finally, it introduces important modern physics themes such as the dual nature of matter and radiation, atomic and nuclear structure, semiconductors and basic communication systems. By the end, you’ll be better prepared for assessments and more capable of explaining physics ideas clearly in writing and problem solutions.