Topic 3 Flashcards
Name some renewable sources of energy?
Solar energy - Solar cells turn sun rays to electricity
Wind - Turn turbines which power generates
Hydroelectricity - Flowing water turns turbines
Geothermal - Used the heat of the Earth
Biomass - Plant fuel
What are some pros & cons of renewable energy
Pro’s
- Doesn’t cause renewable
- There is no fuel cost
Con’s
- Costs money to build
- Wind turbines spoil the view
- Hydroelectric - Damage wildlife and habitats
- Most of them are not available all the time
What are some pros & cons of non-renewable energy
Pro’s
- Cheaper
- Available all the time
Con’s
- Eventually run out
- Release harmful gases
- Extracting and transporting fuel causes pollution
What are some pros & cons of nuclear power
Pro’s
-Don’t release harmful gases
Con’s
- Eventually run out
- Possibility of an accident
- Produce radioactive waste
How do you induce a current?
If you move a loop of wire in a magnetic field, an electric current will flow in the wire. The current produced is an induced current
How do generators work?
Permanent magnets produce a magnetic field. The stronger the magnetic field, the greater the current
A coil is wound on an iron core. The many turns of wire and the iron core increase the size of the current
The ends of the coil are connected to slip rings. These allow the coil to spin without twisting the wires to the rest of the circuit.
Carbon brushes press on the slip rings to make electrical contact with the rest of the circuit. This forms an induced alternating current
How does the national grid transmit electricity?
The national grid increase the voltage and decrease the current when transporting electricity, this is because it is more efficient as less energy is lost as heat.
Name some forms of energy?
- Thermal
- Light
- Sound
- Electrical
- Kinetic
- Chemical
- Nuclear
- Elastic Potential
- Gravitational Potential
