module 7 (electricity) Flashcards
define current
how quickly the electrons flow through the wires
define electrical current
a flow of charged particles
what is electrical current measured in?
amps
what is needed in a circuit?
an energy supply, a component, a complete loop made of a connector
how does a fuse work?
if too much current flows through, the fuse heats up, melting the fuse wire and breaking the circuit
define a series circuit
a circuit where all the components are connected next to each other in one single loop
define a parallel circuit
a circuit where the components are connected in several loops
define potential difference (voltage)
the energy carried by electrons through a circuit
what does a cell (battery) consist of
two different metals, suspended in acidic solution
define resistance
a measure of the opposition to current flow in an electrical circuit
what is resistance measured in?
ohms ( Ω )
how do you calculate resistance?
resistance = potential difference (voltage) / current
define circuit
a complete path which electrical energy can flow through
