EDEXCEL PHYSICS ADDITIONAL P2 QUIZ VARIOUS TOPICS

Please don't use this quiz as a staple revision source. I have made flash cards for P2 (not electronically) and when filtering through which answers I know and which I don't, this quiz is based on all the flash cards I didn't know. 

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1. What is critical mass?

  • The amount of KE energy produced in fission
  • The TIR.
  • The minimum mass of fissile material (uranium) that is able to sustain a chain reaction.
  • The maximum mass of fissile material (uranium) that is able to sustain a chain reaction.
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2. Disadvantages of nuclear power?

  • Expensive and renewable
  • Lots of background radiation produced, waste is hard to deal with
  • Expensive, bad reputation with the public, waste is radioactive for years
  • High risk of nuclear accidents

3. What happens in radiotherapy?

  • A beta source is used to target cancerous cells by rotating an intense beam of gamma rays, most cancer cells can be killed with little damage to healthy cells.
  • An alpha source of cobalt is used to target cancerous cells by rotating an intense beam of gamma rays, most cancer cells can be killed with little damage to healthy cells.
  • A gamma source of cobalt is used to target cancerous cells by rotating an intense beam of gamma rays, most cancer cells can be killed with little damage to healthy cells.
  • A gamma source of iodine is used to target cancerous cells by rotating an intense beam of gamma rays, most cancer cells can be killed with little damage to healthy cells.

4. How does the KE produced from fission, in nuclear power stations, power turbines?

  • When KE is turned into heat and used to boil water to make steam - the steam powers turbines
  • When KE just powers turbines
  • The KE is changed to electrical energy which powers the turbines
  • The KE faces air resistance

5. How do moderators increase rates of fission?

  • Slowing down fast-moving neutrons because slow moving neutrons are more likely to be absorbed by the uranium atom
  • Removing the thermal energy produced in fission reactions so it can be used to heat water to produce steam to power turbines
  • Slowing down fast-moving electrons because slow moving electrons are more likely to be absorbed by the uranium atom
  • Slowing down fast-moving protons because slow moving protons are more likely to be absorbed by the uranium atom

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