Atomic structure as it relates to electricity involves the movement of which subatomic particle, and what is the role of magnetism in electrical devices?

A basic electrical circuit contains a ______ source, a load, and conductors to carry the current.

Current flow (in amps) is affected by the ______ (in ohms) presented by the load.

The amount of energy consumed by a load is often expressed in ______ (W).

Which of the following is NOT a component of a basic electrical circuit?

Refer to the diagram of the simple circuit. What component is labeled as the 'load' in the diagram?

The nucleus of an atom contains one or more positive particles called _________?

The nucleus of an atom is orbited by one or more negative particles called _________?

Refer to the diagram of the atom. What is the charge of the particle labeled 'NUCLEUS'?

According to the Law of Electrical Charges, what happens when like charges are brought close to each other?

According to the Law of Electrical Charges, what happens when unlike charges are brought close to each other?

Like charges _______ one another, while unlike charges _______ one another.

Whether or not a substance is a good conductor or insulator depends on the number of electrons in the outermost (valence) shell of the atom. What does the number of electrons in the outermost shell determine?

A conductor has ______ or fewer electrons in the outer shell, an insulator has five or more, and a semiconductor has four.

Which of the following best describes a semiconductor?

What is the name of the outermost shell labeled in the diagram?

Magnetic fields are used to operate which of the following devices?

Magnetic objects have a north and south pole. Opposing poles attract while like poles repel.

Magnetic objects have a ______ and ______ pole.

Current flow through a conductor produces a magnetic field. When wrapped around an iron bar, it produces an _________?

The opposing forces in a rotating magnetic field can be used to turn a ________.

Electric power can be generated using which of the following types of power plants?

According to the diagram, what is the voltage range at which electricity is generated at the generating station?

What device is used to step up or step down voltage in the power distribution process?

Typical residences receive voltage at what value to operate large appliances such as stoves and clothes dryers?

Small appliances such as toasters and hair dryers operate at ________ in typical residences.

Commercial power is typically three-phase and supplied at which of the following voltages?

What is the voltage supplied to the entrance box of a typical residence?

The basic unit of measurement for electrical current, represented by the letter A, is called ________.

A quantity of electricity that is either positive or negative is called a ________.

A complete path for current flow is called a ________.

The movement, or flow, of electrons in a circuit is called ________. It is measured in amperes.

Negatively charged particles that orbit the nucleus of an atom are called ________.

A material through which it is difficult to conduct an electric current is called an ________.

Any substance that has mass and occupies space is called ________.

The center of an atom, which contains the protons and neutrons of the atom, is called the _______.

The basic unit of measurement for resistance, represented by the symbol Ω, is called _______.

Electromechanical devices consisting of a coil and one or more sets of contacts. Used as a switching device.

An electrical property that opposes the flow of current through a circuit. ______ (R) is measured in ohms.

Electromagnetic coils used to control a mechanical device such as a valve.

The unit of measurement for voltage, represented by the letter V, is called ________.

The basic unit of measurement for electrical power, represented by the letter W, is called ________.