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AP Intermediate 2nd Year Nuclei — practice questions — page 2

Explore 37 free Nuclei questions in AP Intermediate 2nd Year Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Nuclei questions and exercises with answers

Showing questions 31–37 of 37.

How many types of radioactive decay are said to occur in nature?Read the answer and worked solution →In alpha decay, which nucleus is emitted?Read the answer and worked solution →Half-life is the time taken for the decay of what fraction of the initial nuclei?Read the answer and worked solution →Mean life is the time at which the number of nuclei falls to what fraction of its initial value?Read the answer and worked solution →Why must the nuclear binding force be much stronger than the Coulomb force?Read the answer and worked solution →A nucleus influencing only the nucleons close to it shows which property of the nuclear force?Read the answer and worked solution →When fusion is achieved by raising the temperature enough to overcome Coulomb repulsion, it is called:Read the answer and worked solution →

Worked practice questions

How many types of radioactive decay are said to occur in nature?

  1. Fifteen types
  2. Three types
  3. Seven types
  4. Eleven types
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Correct answer: B. Three types

1. Radioactive decay is classified by what the nucleus emits. 2. The emissions are a helium nucleus, an electron or positron, or a photon. 3. Three types of radioactive decay occur in nature. 4. They are alpha, beta and gamma decay. _Source: syllabus Physics Part II, Ch 13 'Nuclei'_

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In alpha decay, which nucleus is emitted?

  1. A hafnium nucleus
  2. A holmium nucleus
  3. A helium nucleus
  4. A hydrogen nucleus
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Correct answer: C. A helium nucleus

1. Each decay type is named for what leaves the nucleus. 2. The alpha particle is a familiar light nucleus. 3. Alpha decay is that in which a helium nucleus is emitted. 4. So the answer is a helium nucleus. _Source: syllabus Physics Part II, Ch 13 'Nuclei'_

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Half-life is the time taken for the decay of what fraction of the initial nuclei?

  1. One fifth of them
  2. One sixth of them
  3. One eighth of them
  4. One half of them
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Correct answer: D. One half of them

1. The name of the quantity states the fraction directly. 2. It is defined against the number present at the start. 3. Half-life is the time taken for the decay of one-half of the initial number of nuclei present. 4. So the answer is one half of them. _Source: syllabus Physics Part II, Ch 13 'Nuclei'_

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