Final answer:
A transducer is a device that converts one type of energy to another, often including a sensor and a transmitter. Examples include solar cells, electric generators, heat engines, and transformers.
Step-by-step explanation:
A transducer is a device that receives one type of energy and converts it to another type of energy and generally includes a sensor and a transmitter. A practical example of a transducer is a solar cell, which converts light energy into electrical energy. This process of energy conversion is also seen in other devices such as an electric generator, which converts mechanical work into electric energy by inducing an electromotive force (emf) while rotating a coil in a magnetic field. Furthermore, devices like heat engines convert heat into work, and heat pumps deliver heat to a hot reservoir.
Similarly, in nature, plants convert light energy into chemical energy through photosynthesis. Additionally, transformers adjust voltages to appropriate levels, transforming voltages from one value to another, to safely supply electrical devices with the correct voltage they require.