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IGCSE Radioactivity Quiz

Jeffrey Piggott 15 preguntas 1.534 visitas

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Preguntas del test (15)

  1. 1A radioactive nucleus emits either an α-particle or a β-particle.
    What are the products of these two types of radioactive emission?
    Imagen de la pregunta 1
    1. AA
    2. BB
    3. CC
    4. DD
  2. 2A reading is taken every 10 minutes of the number of emissions per second from a radioactive source. The table shows the readings.
    What is the half-life of the source?
    Imagen de la pregunta 2
    1. AA 10 min
    2. BB 20 min
    3. CC 40 min
    4. DD 60 min
  3. 3The graph shows how the decay rate of a radioactive source changes with time.
    What will be the activity at 8 days?     Imagen de la pregunta 3
    1. AA 0 decays / s
    2. BB 125 decays / s
    3. CC 250 decays / s
    4. DD 500 decays / s
  4. 4A sample of a radioactive isotope has an initial rate of emission of 128 counts per minute and a
    half-life of 4 days.
    How long will it take for the rate of emission to fall to 32 counts per minute?
    1. AA 2 days
    2. BB 4 days
    3. CC 8 days
    4. DD 12 days
  5. 5Radioactive materials should be handled carefully.
    Which safety precaution does not reduce the risk to people using a radioactive material?



    1. AA keeping the material a long distance from people
    2. BB keeping the material at a low temperature
    3. CC using lead screening between the material and people
    4. DD using the material for only a short time
  6. 6 A scientist carries out an experiment using a sealed source which emits β-particles. The range
    of the β-particles in the air is about 30 cm.
    Which precaution is the most effective to protect the scientist from the radiation?
    1. AA handling the source with long tongs



      handling the source with long tongs
    2. BB keeping the temperature of the source low
    3. CC opening all windows in the laboratory
    4. DD washing his hands before leaving the laboratory
  7. 7 Which row describes the nature of α-particles and of γ-rays?
    Imagen de la pregunta 7
    1. AA
    2. BB
    3. CC
    4. DD
  8. 8The diagram shows the paths of three different types of radiation, X, Y and Z.
    Which row in the table correctly identifies X, Y and Z?     Imagen de la pregunta 8
    1. AA
    2. BB
    3. CC
    4. DD
  9. 9In a laboratory, a detector of ionising radiation records an average background count rate of 8 counts per second.
    A radioactive source is now placed close to the detector. The count rate on the detector rises to 200 counts per second.
    What is the count rate due to radiation from the radioactive source?     Imagen de la pregunta 9
    1. AA 25 counts / s
    2. BB 192 counts / s
    3. CC 200 counts / s
    4. DD 208 counts / s
  10. 10 Which statement about α-radiation is correct?
    1. AA It is a stream of fast-moving electrons.
    2. BB It is a form of electromagnetic radiation.
    3. CC It is more highly ionising than γ-radiation.
    4. DD It is more penetrating than β-radiation.

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Descripción
Quiz for Cambridge 0654 IGCSE Radioactivity Topic.
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English
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