There are several types of transformers, and they can be classified based on different criteria. The following are four common types of transformers based on their application: 1). Power Transformers: These are the most common type of transformers, and they are used for power distribution and transmission. They have a high power rating and are used to step up or step down the voltage in power systems. 2). Distribution Transformers: These transformers are used to distribute electrical power to homes and businesses. They have a lower power rating than power transformers and are used to step down the voltage from the primary distribution network to the secondary distribution network. 3). Isolation Transformers: These transformers are used to isolate electrical circuits from each other, providing electrical isolation and protection against electric shocks. They are commonly used in medical equipment, electronic devices, and other applications where safety is a concern. 4). Autotransformers: These transformers have only one winding, which acts as both the primary and secondary winding. They are used for voltage regulation and to provide a variable voltage output. Autotransformers are smaller and more efficient than conventional transformers, but they are not suitable for applications where electrical isolation is required.