5360166
Description
Flashcards by Princess Terin, updated more than 1 year ago
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Created by Princess Terin
almost 8 years ago
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| Question | Answer |
| Define current | The rate of the flow of charge. |
| Define voltage | Electrical pressure giving a measure of the energy transferred |
| List 6 renewable resources | Solar Wind Tidal Wave Geothermal Hydrological or Hydroelectric Power (HEP) |
| Give one advantage of solar energy | Potentially infinite energy supply. Single dwellings can have own electricity supply. No harmful gases produced. |
| Give one disadvantage of Solar energy | Manufacture and implementation of solar panels can be costly. |
| Give one advantage of wind energy | Can be found singularly, but usually many together in wind farms. Potentially infinite energy supply. No harmful gases produced. |
| Give one disadvantage of wind energy | Manufacture and implementation of wind farms can be costly. Some local people object to on-shore wind farms, arguing that it spoils the countryside. |
| Give one advantage of tidal energy | Ideal for an island such as the UK. Potential to generate a lot of energy. Tidal barrage can double as a bridge, and help prevent flooding. No harmful gases produced. |
| Give one disadvantage of tidal energy | Construction of barrage is very costly. Only a few estuaries are suitable.. Opposed by some environmental groups due to its negative impact on wildlife.. May reduce tidal flow and impede flow of sewage out to sea. |
| Give one advantage of wave energy | Ideal for an island country. More likely to be small local operations, rather than done on a national scale. No harmful gases produced. |
| Give one disadvantage of wave energy | Construction can be costly. May be opposed by local or environmental groups. |
| Give one advantage of geothermal energy | Potentially infinite energy supply. Used successfully in some countries, such as New Zealand and Iceland. No harmful gases produced. |
| Give one disadvantage of geothermal energy | Can be expensive to set up and only works in areas of volcanic activity. Geothermal and volcanic activity might calm down, leaving power stations redundant. Dangerous elements found underground must be disposed of carefully. |
| Give one advantage of Hydroelectric energy (HEP) | Creates water reserves as well as energy supplies. No harmful gases produced. |
| Give one disadvantage of Hydroelectric energy (HEP) | Costly to build. Can cause the flooding of surrounding communities and landscapes. Dams have major ecological impacts on local hydrology. |
| Give 4 ways you could increase the size of an induced current? | Use a coil of wire/increase the number of turns, use an iron core, use a stronger magnet, move the magnet more quickly. |
| What do transformers do? | Change the voltage of a current. |
| Why is electricity transmitted at high voltages? | Improves efficiency by reducing heat loss. |
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