2.1 Generation Of Electricity

Question 1

What are our main sources of energy?

Answer 1

Fossil fuels: coal, oil and gas.

Question 2

What does FINITE mean when describing fossil fuels?

Answer 2

It means that the fossil fuels will eventually run out and take a long time to form.

Question 3

What are the main sources of renewable energy?

Answer 3

Solar
Wind
Waves
Tidal
Geothermal
Hydroelectric
Biomass

Question 4

What are the main sources of non-renewable energy?

Answer 4

Coal
Oil
Gas
Peat
Nuclear

Question 5

What is an advantage of renewable energy sources?

Answer 5

They will never run out because they are renewable.

Question 6

What is an advantage of non-renewable energy sources?

Answer 6

Produce a lot of energy.

Question 7

What is a transformer?

Answer 7

A device that can change the size of an ac voltage. It can either increase or decrease the size of a voltage.

Question 8

Describe the structure of a transformer.

Answer 8

Consists of two seperate coils of wire wound in the same iron core.

Question 9

What equation describes the relationship between the voltage and the number of turns for the primary and secondary coils of the transformer?

Answer 9

Secondary Voltage/ Primary Voltage= Secondary Number of Turns/ Primary Number of Turns

or Vs/ Vp= Ns/ Np

Question 10

What equation should be used to calculate efficiency?

Answer 10

Efficiency= Output/ Input (Power or Energy)