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