| A | B |
|---|
| Electricity is described as a form of | energy |
| The flow of electricity along a conductor is called a(n) | electric current |
| Metals used in electric wiring and motors are materials that are considered good electricity | conductors |
| Electric wires are usually covered with a rubber substance that is used as an insulator or | nonconductor |
| The path of electricity from the generating source through conductors and back to the original source is called a(n) | complete circuit |
| Electric current that is constant, even-flowing and travels in one direction is | direct current |
| The device that changes direct current to alternating current is a(n) | converter |
| A rapid and interrupted current that flows in one direction then in the opposite direction is | alternating current |
| The unit that measures the pressure or force that pushes the flow of electrons through a conductor is a(n) | volt |
| The unit that measures the amount of electric current is a(n) | ampere |
| The current that is used for facial and scalp treatments is | milliamperes |
| The unit that measures how much electric energy is being used in one second is a(n) | watt |
| The device that prevents excessive current from passing through a circuit is a(n) | fuse |
| A switch that automatically interrupts or shuts off an electric current at the first indication of an overload is a(n) | circuit breaker |
| An important way of promoting electrical safety is the principle of | grounding |
| An applicator that is used for directing the electic current from the machine to the client's skin is called a(n) | electrode |
| The positive electrode of an electrotherapy device is called a(n) | anode |
| The negative electrode of an electrotherapy device is called a(n) | cathode |
| The most commonly used modality that is a constant and direct current is | galvanic current |
| The process of introducing water-soluble products into the skin with the use of electic current is called | iontophoresis |
| A process that forces liquids into the tissue from the negative toward the positive pole is called | anaphoresis |
| A thermal or heat-producing current with a high rate of oscillation that is used for scalp and facial treatments is | Tesla current |
| Visible light, the part of the electromagnetic radiation spectrum that we can see, makes up what percentage of natural sunlight | 35 percent |
| The long wavelengths that penetrate the deepest and produce the most heat are | infrared rays |
| To avoid damage to the eyes of a client or practitioner when using light therapy treatments, the eyes should be protected with saturated cotton pads or | safety goggles |
