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Agniveer Air Force Modern Physics — practice questions

Explore 18 free Modern Physics questions in Agniveer Air Force Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Modern Physics questions and exercises with answers

Showing questions 1–18 of 18.

Atoms of an element differing in mass are called:Read the answer and worked solution →How many isotopes does hydrogen have?Read the answer and worked solution →Which element is said to have 32 isotopes?Read the answer and worked solution →The nuclei of isotopes of one element contain the same number of:Read the answer and worked solution →The density of a nucleus is:Read the answer and worked solution →Nuclei are compared to a drop of:Read the answer and worked solution →The difference between a nucleus and its constituents in mass is the:Read the answer and worked solution →The mass defect is explained by whose equivalence of mass and energy?Read the answer and worked solution →The average energy needed to remove one nucleon is the binding energy:Read the answer and worked solution →The binding energy curve is flat between mass numbers:Read the answer and worked solution →Who discovered radioactivity, in 1896?Read the answer and worked solution →Becquerel made his discovery while studying:Read the answer and worked solution →Becquerel's emission penetrated black paper and:Read the answer and worked solution →Radioactivity is a decay undergone by a nucleus that is:Read the answer and worked solution →How many types of radioactive decay occur in nature?Read the answer and worked solution →In beta decay, which particles may be emitted?Read the answer and worked solution →A positron has the same mass as an electron but a charge that is:Read the answer and worked solution →In gamma decay, what is emitted?Read the answer and worked solution →

Worked practice questions

Atoms of an element differing in mass are called:

  1. Isotopes
  2. Isobars
  3. Isomers
  4. Isotones
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Correct answer: A. Isotopes

1. They belong to the same element. 2. Their nuclei hold the same number of protons. 3. They are isotopes. _Source: syllabus Physics, Ch 13 'Nuclei'_

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How many isotopes does hydrogen have?

  1. Nine
  2. Three
  3. Seven
  4. Eight
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Correct answer: B. Three

1. Hydrogen is the lightest element. 2. Deuterium and tritium are two of them. 3. It has three isotopes. _Source: syllabus Physics, Ch 13 'Nuclei'_

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Which element is said to have 32 isotopes?

  1. Zinc
  2. Lead
  3. Gold
  4. Iron
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Correct answer: C. Gold

1. Their mass numbers run from 173 upward. 2. The nuclei all share the same proton count. 3. The element is gold. _Source: syllabus Physics, Ch 13 'Nuclei'_

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