NCATT AET Study 1: Basic Terms and Definitions (a) Direct Current (DC) Terms Questions and Answers with complete solution

Direct Current - Current that flows in one direction. Electron - The negatively charged particle in an atom that orbits the nucleus. Proton - The positively charged particle in the nucleus of an atom. Neutron - The neutrally charged particle in the nucleus of an atom. Conductor - Elements that readily conduct electricity. Static electricity - A stationary electric charge built up on an insulating material. Current - The flow of electrons. Coulomb - The unit for measuring charges. 6.24x10^18 electrons. Ampere - The unit for measuring the flow of electrons. EMF - Electro Motive Force. Volt - The unit of measurement of EMF. When a charge of one coulomb exists between to bodies there is one volt of charge. Resistance - Opposition to the flow of electrons.Ohm - The unit of measure for resistance. Watts - The unit of measure for Power. Capacitor - An electronic component that stores electricity in the form of an electrostatic field and releases it quickly. Opposes change in voltage