TLE 10 Introduction to Electricity

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Electricity

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34 Terms

1

Electricity

refers to the flow of electrical power or charge

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2

Circuit

the path where electric current flows on

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3

Closed Circuit

a complete circuit in which electric current flows, "on"

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4

Open Circuit

no current flows, the path is incomplete, "off"

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5

Complete Circuit

- Wire
- Control
- Voltage
- Resistance/Load

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6

Types of Electricity

- Dynamic Electricity
- Static Electricity

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7

Dynamic Electricity

A set of physical phenomena associated with presence and motion of matter.
- All phenomena are related to electrical charges in motion.
- It requires electrical material to make electrons move in a circuit

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8

Two Types of Dynamic Electricity

- Direct Current (DC)
- Alternating Current (AC)

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9

Direct Current

- The electrons always flow in one direction at any time.
- The voltage is always constant in this current.
- Dry cells/Batteries are the source of energy in this current.
- Flashlights, Phones, Laptops, Remote, Clocks are examples of this current.

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10

The other term for potential difference

Voltage

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11

Alternating Current

- The flow of this current moves back and forth with the changing magnetic field.
- This is the type of electricity from wall sockets in your home.
- E.g. air conditioner, motor

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12

Frequency

refers to the changes of direction in one second

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13

Static Electricity

- This type of electricity is build-up of electric charge on an object.
- It is a charge that does not move or flow.
- This energy produces through friction

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14

Electric Charge

It is referred to as the basic property of protons and electrons

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15

Protons and Electrons

It has a property of electric charge

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16

Electric Discharge

The loss of static electricity as electric charges move in an object.

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17

Positively charged

It is the term when an object loses electrons

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18

Negatively charged

It is the term when an object gains electrons

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19

Primary source of our energy today

generator or dynamo

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20

Secondary Energy Source

Produced by converting primary sources of energy such as coal, natural gas, nuclear energy, solar energy, and wind energy, into electrical power.

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21

Dry cell and Battery

are made up of chemicals that could produce electricity.

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22

Electrode

a conductor through which electricity enters or leaves an object, or substance.

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23

Electrolyte

a liquid or gel which contains ions and can be decomposed by electrolysis, e.g. that present in a battery.

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24

Photo voltaic cell

device that converts sunlight into electricity

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25

Piezoelectric Effect

electricity generated by applying pressure

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26

Generator

a device that uses electromagnetic induction to convert kinetic energy into electrical energy

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27

thermocouple

a device that indicates and control the heat of electric oven and furnace

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28

potential difference

will develop if two metals were twisted and heated

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29

Electromagnetic waves

created as a result of vibrations between an electric field and magnetic field

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30

Electromagnetic Field

a classical field produced by moving electric charges

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31

Electrodynamics

study of phenomena associated with charged bodies in motion and varying electric and magnetic fields

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32

Electromagnetism

a term where the electromagnetic force is carried by electromagnetic fields composed of electric fields and magnetic fields

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33

Magnetic Force

a term where it acts between two magnetic objects

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34

Electrical Safety Tips

- Take care of yourself
- Lighten your load
- Change your body posture
- Choose the right tools
- Observe exceptional housekeeping

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