Two sides of a same coin. But how?? You are perhaps confused by the title, isn't it? Well let me tell you what the question is. Electricity and Magnetism are said to be "two sides of a same coin". But can anybody help me understand the actual relation between electric and magnetic fields and that how does electromagnetic induction works? In short, I want to know how were the two phenomena- Electricity and Magnetism, unified into a single theory called 'ELECTROMAGNETISM'