Electrons, a component of atoms, and their use known as electronics play an important role in many pieces of household equipment. Basic electronics comprises the minimal "electronics components" that make up a part of everyday electronics equipment. These electronic components include resistors, transistors, capacitors, diodes, inductors and transformers. Powered by a battery, they are designed to work under certain physics laws and principles. Basic electronics also concerns the measurement of voltage, current (electron flow) and resistance in the assembled working "circuit."