Electricity Flashcards
Electricity
The flow of electrical power or charge, a fundamental form of energy observable in
positive and negative forms.
Current (I):
The flow of electric charge through a conductor, measured in amperes (A).
Voltage
The difference in electrical potential energy between two points in a circuit,
measured in volts (V).
Resistance (R)
The opposition to the flow of current in an electrical circuit, measured in ohms
(Ω).
Circuit:
A closed loop that allows electricity to flow from the power source through a connected
load and back.
Insulator
A material that resists the flow of electrical charge, commonly used to protect and
separate conductors.
Conductor
A material that allows the flow of electrical charge, typically metals like copper or
aluminum.
Fuse
A safety device consisting of a strip of wire that melts and breaks an electric circuit if the
current exceeds a safe level.
Ohm’s Law
A principle stating that the current through a conductor between two points is
directly proportional to the voltage across the two points and inversely proportional to the
resistance between them.
