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OCR Physics P2 revision cards
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- 1What is the equation for power?power = voltage x current
- 2What are the disadvantages of wind turbines?Spoil the landscape, need a high wind speed, take up a large area.
- 3What is the difference between direct current (DC) and alternating current (AC)?Direct current has a voltage which is always the same. It is always in one direction. Alternating current has a voltage that switches smoothly between positive and negative values.
- 4Why does the National Grid use transformers?If you increase the voltage, the current decreases. The lower the current, the less heat is produced (hence reducing energy lost).
- 5Name examples of non-renewable energy sources.Coal, crude oil, natural gas.
- 6How can you detect nuclear radiation?Using a Geiger-Muller (GM) tube.
- 7What is decommissioning?Taking a building down after usage.
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- GCSE Physics Fichas sobre OCR Physics P2 revision cards, creado por Alex Howard el 06/05/2014.
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- Alex Howard
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