Science: Principles of Electricity

Question 1

A form of energy that produces light, heat and magnetic and chemical changes

Answer 1

Electricity

Question 2

The movement of electricity along a path called a conductor

Answer 2

Electric Current

Question 3

A technical name for any electrically powered appliance

Answer 3

Load

Question 4

Material that allows electricity to flow through it easily

Answer 4

Conductor

Question 5

A material that does not allow the flow of electric current

Answer 5

Insulator

Question 6

A unit of electric strength

Answer 6

Amp

Question 7

A unit of electric pressure

Answer 7

Volt

Question 8

A unit of electric resistance

Answer 8

Ohm

Question 9

A measure of electrical energy being used per second

Answer 9

Watt

Question 10

1,000 watts = how many kilowatts?

Answer 10

1 kilowatt

Question 11

Most of the electricity used daily consists of a flow of tiny, negatively charged particles called:

Answer 11

Electrons

Question 12

Silver, copper, water-containing ions, graphite, carbon, and the human body are all examples of what type of materials?

Answer 12

Conductors

Question 13

Silk, plastic, rubber, wood, glass, paper, alcohol, and pure distilled water are all examples of what type of materials?

Answer 13

Insulators

Question 14

Cords on appliances should be kept straight and free to knots, kinks, and tangles to prevent:

Answer 14

breaks

Question 15

Amp=

Answer 15

strength

Question 16

volt=

Answer 16

pressure

Question 17

Ohm=

Answer 17

resistance

Question 18

Watt=

Answer 18

electricity used

Question 19

What part of an appliance tells the frequency, volts needed, and watts consumed per second?

Answer 19

Nameplate

Question 20

Form of electric current where electrons move at an even rate in only one direction

Answer 20

DC or Direct Current

Question 21

Form of electric current where electrons flow first in one direction and then the other

Answer 21

AC or Alternating Current

Question 22

Changes direct current to alternating current

Answer 22

Inverter

Question 23

Changes alternating current to direct current

Answer 23

Rectifier

Question 24

What are the 2 conditions necessary for an electric current?

Answer 24

1. Source: generator AC or Battery DC
2. Circuit: closed path through which electrons travel

Question 25

What type of circuit is a path of electron flow from source to operate the appliance, & the switch is on

Answer 25

Closed Circuit

Question 26

What type of circuit is a path of electron flow is broken, & the switch is off

Answer 26

Open Circuit

Question 27

What is Parallel wiring?

Answer 27

powers several loads at once or at different times, should be used in a salon

Question 28

What is series wiring?

Answer 28

runs all loads at the same time, circuit travels from one load to the next (like Christmas lights)

Question 29

What happens when more current flows in the line than it is designed to carry

Answer 29

Overload

Question 30

What is a short circuit

Answer 30

Occurs when a foreign conductor comes in contact with a wire carrying current to a load.

Question 31

What safety device contains a fine metal wire that allows current to flow through it. If an overload occurs, it will heat up and melt, breaking the circuit. Cannot be reused

Answer 31

Fuse

Question 32

What reusable safety device breaks the flow of current when an overload occurs. If the flow of current is too high the pieces separate and the switch turns off.

Answer 32

Circuit breaker

Question 33

If a fire results from overload of an electric circuit should you put water on it?

Answer 33

No

Question 34

For fire extinguisher use, remember PASS- which stands for?

Answer 34

Pull the pin on the handle
Aim the hose at the base of the fire
Squeeze the handle to begin the flow
Spray chemical discharge back and forth over the fire