electric current

Question 1

What is the input devices

Answer 1

• that provide electric charge

- A cell

Question 2

What are output devices

Answer 2

• convert electrical energy to another type

- eg lampsand heater

Question 3

What are process devices

Answer 3

-they can slow down or restrict the flow of electric current in a circuit

Question 4

What are control devices

Answer 4

-they can either open or close a circuit, so that current is not flowing or flowing, respectively

Question 5

What are Electrochemical cell

Answer 5

• a comment that contains chemicals that cause an electric current to flow when they are connected in a circuit
• known as battery

Question 6

what is Electricity distribution

Answer 6

-The process of electricity delivery to households and commercial customers

Question 7

What is the National electricity grid

Answer 7

-The system through which electricity is transmitted

Question 8

What is electricity theft

Answer 8

-Electricity is stolen by people who connect directly to an electricity box, a streetlight, or even their neighbour’s electricity supply

Question 9

What is electrocuted

Answer 9

-when a current passes through the body

Question 10

What can happen when people tamper with their electricity meters

Answer 10

– this could very easily lead to an electrical fire or and electrocution.

Question 11

what does Households need electricity for

Answer 11

-to heat water, to use electrical appliances and to provide lighting.

Question 12

What is demand

Answer 12

-a high level of need or requirement for goods or service

Question 13

What is Equitably:

Answer 13

-fairly according to need and for the common good

Question 14

what is a electrolyte

Answer 14

-a liquid substance which can conduct electricity

Question 15

What is a electrode

Answer 15

-an electric conductor that makes contact with a non metallic part of an electrical circuit

Question 16

What is galvanised

Answer 16

-coated with zinc

Question 17

What is Photovoltaic cell

Answer 17

• a unit that makes up a solar panel and which can convert light energy into an electric current

Question 18

What is a solar panel

Answer 18

-a board or sheet

Question 19

What is renewable

Answer 19

• easily restored and readily available

- cannot be used up

Question 20

What is inefficient

Answer 20

-not performing or functioning in the best possible manner

Question 21

What is the greenhouse effect

Answer 21

-the build-up of carbon dioxide in the Earth’s atmosphere has meant that the sun’s heat cannot be reflected back into the atmosphere - the carbon dioxide forms a ‘blanket’ or ‘greenhouse’ around the Earth, which means that the Earth gets hotter

Question 22

What is uranium

Answer 22

-a radioactive substance that is capable of causing a nuclear reaction

Question 23

What is eyesore

Answer 23

-something thats ugly to look at

Question 24

What is transmission

Answer 24

-when the electricity is moved from the power station to local distribution substances

Question 25

What is distribution

Answer 25

-after the electricity reaches the distribution substation and it is delivered to households and commercial customers

Question 26

What is step up transformers

Answer 26

- a device taht increases the voltage of electricity

Question 27

what is distribution substation

Answer 27

-a place where high voltage electricity from the transmission system ia put through a step -down transformer in order to start the distribution process in local areas

Question 28

what is step down transformers

Answer 28

-a device that decrease the voltage of electricity

Question 29

what is binary logic

Answer 29

-rules based on the principle that all relationships can either on or off or 0 or 1

Question 30

What is contractor

Answer 30

-a device which closes a circuit when its two parts touch each other

Question 31

What is a panic button

Answer 31

-a button that is pressed in emergencies and usually triggers an alarm or calls for help