Electromagnet: An electromagnet is a type of magnet that consists of a coil of wire wrapped around an iron core. When an electric current flows through the wire, it creates a magnetic field.
Transformer:A transformer is an electrical device that transfers electrical energy between two or more circuits using electromagnetic induction. It consists of two coils (primary and secondary) wound around a common magnetic core.
Magnetic Field Lines: Magnetic field lines are imaginary lines used to represent the direction and strength of the magnetic field surrounding a magnet or current-carrying conductor. They form closed loops from north pole to south pole outside the magnet and continue inside from south pole to north pole.