Electric Current
circuit
A closed loop of conducting material which includes a source of electromotive force
Conductivity
A measure of the ability of a material to conduct an electric current
conductor
A substance that transmits electricity
electricity from power plants is delivered as ___ current.
Alternating
Of the following, the best conductor is ___.
Copper
Direct Current (DC)
Current that moves in one direction generally produced by batteries or wet cells
Which of the following would increase the conductivity of a connecting wire?
Increase the diameter, decrease the temperature, switch from steel to gold
A substance that prevents the flow of electric current is a(n):
Insulator
Which of the following does not show a complete circuit?
The one with no battery
Who patented the lightbulb?
Thomas Edison
Alternating Current (AC)
current in which the flow of charges changes directions several times each second
Charges in an electric field will move electrons to:
decrease their potential energy
The force that pushes charges through a wire is called:
electromotive
electric current
flow of electric charge through a conductor; measured in amperes
The purpose of a battery in a circuit is to ___.
increase the potential of charges in the circuit
electromotive force
the amount of energy derived from an electric source; the force that results from differences in potential that cause an electric current, commonly measured in volts
Electric current is ___.
the continuous flow of electric charges in a conductor
Volt
unit of electric potential difference
