_______________________ current is a constant and direct current, having a positive and negative pole, that produces chemical changes when it passes through the tissues and fluids of the body.

_______________________ is the negative or positive poles of an electric current.

Currents used in electrical facial and scalp treatments are called _______________________.

A device that prevents excessive current from passing through a circuit is a(n) _______________________________.

A _______________ equals 1,000 watts.

________________________ measures how much electric energy is used in one second.

____________________ measures the resistance of an electric current.

A ______________________ equals one-thousandth of an ampere.

__________________ measures the strength of an electrical current.

The movement of electrons from one atom to another along a conductor.

A(n) ______________ is the flow of electricity along a conductor.

Any material that allows electricity to pass through easily is a(n) _________________________.

A material that does not transmit electricity is a(n) ___________________________, also known as a nonconductor.

Direct current is a constant, even-flowing current that travels in ________________________________.

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_____________________ current is a rapid and interrupted current, flowing first in one direction and then in the opposite direction.

___________________ measures the pressure or force that pushes electric current forward through a conductor.