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Flashcards in Basics of Electricity Deck (38)
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1

The movement particles around an atom that creates pure energy is known as:

Electricity.

2

The flow of electricity along a conductor in a complete circuit is called:

An electric current.

3

A ________ is any material that easily conducts electricity.

Conductor.

4

Rubber, silk, wood and cement are good examples of ________: Also known as nonconductors.

Insulators.

5

The path of negative and positive electric currents moving from the generating source through the conductors and back to the generating original source or to the ground is known as:

A complete electric circuit.

6

A _______ ________ is a constant, even-flowing current that travels in one direction only.

Direct current.

7

An apparatus that changes direct current to alternating current is called:

A converter.

8

A rapid and interrupted current, flowing first in one direction and then in the opposite direction is known as:

Alternating current.

9

A _______ is an apparatus that changes alternating current into direct current.

Rectifier.

10

The unit that measures the pressure or force that pushes the flow of electrons forward through a conductor is called a ______.

Volt.

11

An amp or ______ is the unit that measures the amount of an electric current.

Ampere.

12

A ___________ is one-thousandth of an ampere.

Milliampere.

13

A unit that measures the resistance of an electric current.

Ohm.

14

A watt measures:

How much energy is being used in 1 second.

15

A kilowatt is ______ watts.

1,000.

16

What is the purpose of a fuse?

It prevents excessive current from passing through a circuit.

17

A switch that automatically interrupts or shuts off an electric circuit at the first indication of an overload:

A circuit breaker.

18

The _______ connection completes the circuit and carries the current safely away to the ground.

Ground.

19

________ indicates the negative or positive pole of an electric current.

Polarity.

20

Iontophoresis is the process of:

Introducing water-soluble products into the skin with the use of electric current.

21

Cataphoresis is the process of:

Infuses a positive (acid) product into the skin.

22

Anaphoresis is the process of infusing:

Alkaline products into the skin.

23

A process used to soften and emulsify grease deposits (oil) and blackheads in the hair follicles.

Desincrustation.

24

_________ is the application of light rays to the skin for the treatment of acne, wrinkles,

Phototherapy.

25

A _________ is the distance between the peaks of two successive waves of electromagnetic radiation.

Wavelength.

26

Shorter wavelengths have a higher ______ than a longer wavelength.

Frequency.

27

Visible light makes up _____ percent of natural sunlight.

35.

28

Gamma rays have the _______ wavelengths.

Shortest.

29

Radio rays/waves have the ______ wavelengths.

Longest.

30

____ rays also called actinic rays make up __ percent of natural sunlight.

UV, 65%.