A DC machine is an electromechanical energy alteration device. The working principle of a DC machine is when electric current flows through a coil within a magnetic field, and then the magnetic force generates a torque which rotates the dc motor where as
a transformer is an electrical equipment used to transfers electrical energy from one electrical circuit to another, or multiple circuits without changing the frequency. Transformers can also be used for isolation, where the voltage in equals the voltage out, with separate coils not electrically bonded to one another.
1. Functionality of DC Machines and DC Motors with their classification.
2. Working of Single phase Transformer and Three phase Transformer with application and functionality.