Ch 12. Electricity basics

Question 1

This current is rapid& interrupted. travels One way than the other direction, 60x/ seconds, & is produced _____. Example:

Answer 1

Alternating current, AC, mechanically, wall outlets.

Question 2

This current is constant it is even flowing and travels in One Direction it is produced ___and an example is___

Answer 2

Direct current, Chemically, batteries

Question 3

This measures the electricity in our house In k/ per ____.(time) 1 of these “(1k)” is 1000 ____. Meaning it uses 1000___ of electricity /second.

Answer 3

Kilowatt. Hour. watt. Watt.

Question 4

Resettable electrical safety device that automatically shuts off and electric circuit at the first indication of overload. All appliances should be UL approved____

Answer 4

Circuit breaker

Underwriters lab

Question 5

A closed loop that conducts electricity and provides a return path for the current

Answer 5

Complete electrical circuit

Question 6

Are any substance that easily allows the flow of electricity with little resistance

Answer 6

Conductor

Question 7

Any apparatus that changes direct current to alternating current

Answer 7

Inverter or converter

Question 8

The flow of electricity In a complete electric circuit

Answer 8

Electric current

Question 9

The movement of particles around an atom that creates pure energy. Or the movement of electrons from one atom to another along a conductor.

Answer 9

Electricity

Question 10

A single use safety device designed to provide protection from an electrical overload or short circuit.It is a deliberately weak link in the circuit that’s designed to break and disconnect the current. To reestablish check all &re-insert a new fuse

Answer 10

Fuse

Question 11

A substance that does not easily allow the flow of electricity

Answer 11

insulator

Question 12

Also called an insulator

Answer 12

Nonconductor

Question 13

Changes alternating current direct current. Like battery chargers

Answer 13

Rectifier

Question 14

Provides double safety device that is designed to provide protection from an unsafe ground. Resettable found in rooms where water may be present they detect leakage and disconnect to prevent electrocution. They disconnect faster than a fuse or a circuit breaker.

Answer 14

Ground fault circuit interrupter

Question 15

Completes an electrical circuit and carries the current safely away. All appliances have a live connection bringing current to the circuit and they have a ground connection that carries it safely away to the ground. Different prong sizes protected ensure the correct insertion. The third prong is an additional ground that insures in case the first ground faults. It is the most safe.

Answer 15

Electrical ground

Question 16

This measures the resistance in an electric___. There is only flow if force(___) is stronger than resistance(___).

Answer 16

OHM, circuit, volt, Ohm.

Question 17

____ is Electromagnetic radiation with a wave length shorter than___ but longer than___ and only visible to some.
It is a wave length just above violet and above the visible spectrum of light both are not really light at all their wave length of electromagnetic radiation.A catalyst speeds up a chemical reaction with either heat or this____.It has more energy and doesn’t penetrate as deeply as visible light.

Answer 17

UV radiation. 
visible light
x-rays
insects or birds
Uv radiation

Question 18

This measures the pressure of force, it pushes the flow of electrons forward through complete electric____. No pressure equals no flow. A cars pressure is 12_ a houses is 110 and ACs and dryer’s are 220.

Answer 18

Voltage, circuit, V.

Question 19

This is how much electricity is being used per _____.
So a 40 ___ lightbulb will use 40 ___ per ___.It doesn’t really indicate how bright or powerful a lightbulb is just how much electricity it uses. Replacement bulbs should be the same as the original to maintain quality of service.

Answer 19

Watts, second, W. W Second

Question 20

____. Is The number of electrons flowing through a complete electric____. The size must be appropriate for easy flow. The hairdryer with 12 __ must have a cord 2X as Thick if it is only 6__.

Answer 20

(Ampere), Circuit. A. A.

Question 21

This wave length is below red and the visible spectrum of light

Answer 21

Infrared radiation

Question 22

It’s 1000th of an ampere. it is the current used for facial and scalp treatments because an amp is too strong and will damage the skin

Answer 22

Milliampere - mA

Question 23

Current will not flow through an electric current unless this is stronger than the resistance OHm

Answer 23

Force, volts

Question 24

What does wattage tell you about Uv nail lamp bulbs

Answer 24

How much electricity it’ll use

Question 25

What type of electrical plug offers the most protection for you and your client

Answer 25

One with two rectangular prongs and a third circular ground

Question 26

What is in ordinary water that makes it a good conductor of electricity

Answer 26

Ions

Question 27

Silk, wood, and cement make good insulators but ___ does not

Answer 27

Copper

Question 28

The speeds up a chemical reaction and is used to make chemical reactions happen faster

Answer 28

Catalyst

Question 29

Electromagnetic radiation is also called this because it carries or radiates energy through space on waves

Answer 29

Radiant energy / visible light

Question 30

Is the number of waves within a given length. Long wavelengths=low (less frequent) & violet has the shortest. ___the longest

Answer 30

Frequency, red

Question 31

This converts electricity into heat by providing resistance to an electric current.They are large enough to carry the current and are designed to overheat so they are safe if used properly. However electrical wires in the wall or appliance cord are not designed for this and can cause a fire

Answer 31

Heating element

Question 32

The distance between two successive peaks is called the

Answer 32

Wave length

Question 33

The movement of electrons from one atom to another along a conductor it doesn’t occupy space or have mass so it isn’t matter it can have a magnetic chemical or thermal affect

Answer 33

Electricity

Question 34

It easily allows the flow of electricity with little resistance most metals are good for this but pure water is poor. Tap and lake or ocean water are good due to its ions. Which is why swimming during lightning storms or using electrical appliances is not recommended

Answer 34

Conductor

Question 35

This is a non-conductor it doesn’t allow flow of electricity easily examples are silk would glass cement and rubber. Wires are usually twisted metal threads and covered in plastic or rubber.

Answer 35

Insulator

Question 36

The flow of electricity in a complete e- circuit. A closed loop conducts electricity and provides a return pass for the current is a ___.

Answer 36

Electric current, Complete electrical circuit

Question 37

The strength of an electric current is this times this

Answer 37

Amps x voltage

Question 38

These wavelengths have lower frequencies and they penetrate deeper they have less energy. And these wave links have higher frequency penetrate less and they have much more energy

Answer 38

Long

Short

Question 39

Safety measures include using all you well certified appliances. Disconnecting things after use. Keeping in good repair. Avoiding water and metal contact while plugged. Not cleaning while plugged. Not stepping on or storing objects on cords. Pulling on plug not cord. Reading instructions first. Inspecting regularly. One plug per outlet. Don’t leave clients unattended. Don’t allow twisted cords. Don’t attempt repairs

Answer 39

All fone

Question 40

These two are not really light at all they are the wavelengths of electromagnetic radiation that are just beyond the visible spectrum. I frequencies outside of our visible spectrum may be visible to insects and birds like the radio microwave infared ultraviolet x-rays and gamma ray

Answer 40

Infeared and ultraviolet rays