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ICSE Class 10 Modern Physics: radioactivity, nuclear fission and fusion — practice questions — page 2

Explore 61 free Modern Physics: radioactivity, nuclear fission and fusion questions in ICSE Class 10 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Modern Physics: radioactivity, nuclear fission and fusion questions and exercises with answers

Showing questions 31–60 of 61.

What triggers induced fission, unlike spontaneous fission?Read the answer and worked solution →How do fission fragments usually compare in size?Read the answer and worked solution →Which process combines atomic nuclei into a larger nucleus?Read the answer and worked solution →Which process powers the Sun?Read the answer and worked solution →What occurs when light nuclei fuse into a larger nucleus?Read the answer and worked solution →What force repels two positively charged nuclei at a distance?Read the answer and worked solution →What allows fusion once nuclei are sufficiently close?Read the answer and worked solution →Fusion below which mass range can release energy?Read the answer and worked solution →What is the Sun’s main fusion product from hydrogen?Read the answer and worked solution →What is the mass difference between fusion reactants and products linked to?Read the answer and worked solution →For nuclei heavier than iron, fusion generally does what energetically?Read the answer and worked solution →What can immediately precede gamma emission by a daughter nucleus?Read the answer and worked solution →Which decay changes a neutron into a proton and emits an electron?Read the answer and worked solution →Which beta decay emits a positron?Read the answer and worked solution →For many identical radioactive atoms, which quantity describes their overall decay rate?Read the answer and worked solution →How does shorter exposure affect radiation dose?Read the answer and worked solution →Why handle a radioactive source with long forceps?Read the answer and worked solution →What is the main role of a radiation shield?Read the answer and worked solution →What does a worker's personal dosimeter measure?Read the answer and worked solution →What is background radiation at a location?Read the answer and worked solution →Which source of background radiation comes from space?Read the answer and worked solution →Which naturally radioactive gas can enter buildings?Read the answer and worked solution →Which contributes to natural terrestrial radiation?Read the answer and worked solution →Which is an artificial source of background radiation?Read the answer and worked solution →Which isotope is used to date once-living material?Read the answer and worked solution →How does alpha-particle mass compare with electron mass?Read the answer and worked solution →Which thin barrier can absorb ordinary beta particles?Read the answer and worked solution →Match each radioactive emission with its particle nature and charge:Read the answer and worked solution →Match each radioactive decay law with its daughter nucleus transformation:Read the answer and worked solution →Match each nuclear reaction type with its process:Read the answer and worked solution →

Worked practice questions

What triggers induced fission, unlike spontaneous fission?

  1. An incoming neutron
  2. A chemical reaction
  3. A seismic sound wave
  4. A visible light signal
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Correct answer: A. An incoming neutron

Induced fission can be triggered by a neutron; spontaneous fission is not neutron-induced.

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How do fission fragments usually compare in size?

  1. Often similar in size
  2. Always exactly equal
  3. One is a proton
  4. Both exceed the parent
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Correct answer: A. Often similar in size

Fission most often produces fragments that are comparable in size but not identical.

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Which process combines atomic nuclei into a larger nucleus?

  1. Nuclear fission
  2. Electron capture
  3. Nuclear fusion
  4. Beta decay
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Correct answer: C. Nuclear fusion

Fusion combines nuclei into a larger nucleus.

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