Electromagnetic theory is a branch of physics that studies the interactions between electric charges and magnetic fields. It explains how electric fields are generated by charged particles and how these fields can influence other charges. The theory is fundamental to understanding various phenomena, including electricity, magnetism, and light. One of the key components of electromagnetic theory is Maxwell's equations, which describe how electric and magnetic fields propagate and interact. This theory has numerous applications, including in telecommunications, electric motors, and wireless technology, making it essential for modern technology and scientific research.