Generating Electricity

Question 1

What is renewable energy

Answer 1

An energy source which can be replenished

Question 2

4 examples of renewable energy

Answer 2

Wind, hydro, tidal, solar

Question 3

Example of non-renewable

Answer 3

Fossil fuels(coal, oil , gas)

Question 4

Nuclear power advantage

Answer 4

Low fuel costs
No greenhouse gasses
Large quantity of energy

Question 5

Nuclear power disadvantage

Answer 5

Creates harmful nuclear waste
Non renewable
Risk of fatalities

Question 6

What do STEP UP transformers do and where are they found

Answer 6

Step up transformers are used when connecting power stations to transmission cables
They increase the potential difference (decreasing current)

Question 7

What do STEP DOWN transformers do and where are they found

Answer 7

Connect transmission cables to buildings (like houses)

Decrease potential difference (increase current)

Question 8

Why do transmission lines transfer electricity at high potentials?

Answer 8

High potential difference = low current
Lower the current the less energy is wasted as heat
Therefore transport is more efficient

Question 9

Why does the potential need to be

decreased between transmission lines and houses?

Answer 9

Lower potentials are safer for domestic use and reduces the likelihood of severe electrocution.
Household appliances are designed for 230V