Electron Flow Theory, Voltage, Current, and Resistance

Flashcards based on lecture notes about Electron Flow Theory, Voltage, Current, and Resistance.

The smallest particles that elements can be broken into and still retain the properties of that element are called .

atoms

The center region of the atom is called the .

nucleus

Protons have a charge.

positive

Electrons have a charge.

negative

In neutral atoms, the number of and is the same.

protons, electrons

Electrons occupy various energy levels around the nucleus, known as .

shells

The number of electrons in the outer shell, called the , is what determines how well the element conducts electricity.

valence shell

A is an element that allows electrons to flow freely.

conductor

An does not conduct much electricity at all.

insulator

Conventional current is described as the flow of electricity from to .

positive, negative

Electrical current is really the flow of .

electrons

Electrical pressure is known as and is measured in .

voltage, volts

Voltage is also known as electrical .

potential difference

The flow of electrons through a conductor is electrical .

current

Electrical current is measured in , or amps.

amperes

Opposition to the flow of current is known as and is measured in .

resistance, ohms

One ohm is defined as the amount of that will allow one of current to flow if one of electrical pressure is applied.

resistance, ampere, volt

Three materials that are most often used as electrical conductors are the metals , , and .

silver, copper, aluminum