1.4 electric currents

• series connection: a single path available for electric current, where the charges flow through one device before passing through to the next
• parallel connection: more than one path available for electric current, where the electric current divides, allowing each portion of the current to simultaneously pass through separate devices
• voltmeter: an instrument that measures the voltage across two points in a circuit
• ammeter: an instrument that measures the electric current flowing through a component in a circuit
• resistor: an electronic component that resists current in a circuit
• resistance: that ratio of the voltage across a device to the current flowing through it
• ohmmeter: an instrument that measures the resistance across two points in a circuit
• schematic diagram: a sketch that uses symbols to detail the components of a systems such as an electrical circuit