An electric current creates a magnetic field, and a changing magnetic field creates an electric current. This reciprocal relationship is the bedrock of modern physics. The Four Pillars of the Electromagnetic Force
High-energy waves that can penetrate solid matter, used in medicine and astrophysics. Why It Matters: Real-World Applications electromagnetism
To understand how this force works, we look to the four main effects it produces: An electric current creates a magnetic field, and
Like charges (positive-positive) repel each other, while opposite charges (positive-negative) attract. while opposite charges (positive-negative) attract.