current electricity Flashcards
what is static electricity?
an imbalance of electric charge on the surface of an object
generally, where does static electricity occur?
in an insulator
what is current electricity?
the controlled flow of electrons through a conductor
generally, where does current electricity occur?
in a conductor
what are the two types of current electricity?
-direct current -alternating current
what is direct current?
the electricity flow in which the electrons flow in one direction only
what is alternating current?
the electricity flow in which electrons repeatedly reverse flow direction
what is an electric circuit?
a continuous (closed) path along which electrons flow
name 3 things an electric circuit must have
-energy source -load -conductor
what is the purpose of the load?
a load converts electrical energy into other energy
what is the function of a switch?
turn the electric circuit on or off by cutting off the path
what is the function of a measuring device?
to measure the electrical property of the circuit
what is the function of a fuse?
a safety device to prevent further damage to other electrical components
what is an electrochemical cell?
a package of chemicals that converts chemical energy into electrical energy
what is a battery?
more than one cell connected
what is the symbol for an electric cell?
what is the symbol for a 3 cell battery
what is the symbol for an open switch?
what is the symbol for a closed switch?
what is the symbol for a lamp?
what is the symbol for a resistor
what is the symbol for a fuse?
