Section 2-Electric Current (Electric Current (Electric current is measured…
Section 2-Electric Current
The measure of how difficult it is for electrons to flow through a material.
In a lightbulb, the filament is made of wire so narrow that it has high resistance
The amount of electrical energy that is converted into thermal energy increases as the resistance of the wire increases.
The electric resistance a wire increases as the wire becomes longer or as it becomes narrower
The electric resistance of a wire also depends on the length and thickness of the wire.
As electrons flow through a circuit, they collied with the atoms and other electrical chargers in the materials that make up the circuit.
insulators generally have a much higher resistance than conductors
Electric current flows in the circuit as long as none of the wires are disconnected or broken.
electrical potential energy can be transformed into other forms of energy
a measure of how much electrical potential energy each electron can gain
the simplest electric circuit contains a source of electrical energy.
Electric current is measured in units of amperes
In liquids, the flowing shares are ions
In solids, the flowing charges are electrons
Individual electrics move slowly in a electric
Electric charges will flow continuously through a closed conducting loop.
the flow of electric charge
Batteries don't supply energy forever, they contain only a limited amount of the chemicals that react to produce chemical energy.
as the electrons move toward the positive battery terminal, the electric potential energy is transformed into other forms of energy.
when the positive and negative terminals in a battery are connected in a circuit, the electrical potential energy of electrons in the circuit is increased.
A battery supplies energy to an electric circuit