Fission Fusion and Radioactivity MCQ 3
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Fission Fusion and Radioactivity MCQ 3

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Questions and Answers

What is the formula to calculate the energy difference of a charged particle in an electric field?

  • $hf = E_1 / E_2$
  • $hf = E_1^2 - E_2^2$
  • $hf = E_2 - E_1$ (correct)
  • $hf = E_2 + E_1$

    • What is the formula to calculate the activity of a radioactive sample?

  • A = dN/dt - λN
  • A = dN/dt + λN
  • A = λN (correct)
  • A = λ/dt

    • What is the relationship between half-life and decay constant?

  • T_½ = λ^2
  • T_½ = λ/ln2
  • T_½ = ln2/λ (correct)
  • T_½ = 1/λ

    • What is the formula to calculate energy from mass according to the mass-energy equivalence equation?

    <p>E = mc^2</p> Signup and view all the answers

    What does the symbol Z represent in the chemical symbol of an isotope?

    <p>Atomic number</p> Signup and view all the answers

    What is the unit of the decay constant λ?

    <p>Seconds^-1</p> Signup and view all the answers

    What is the relationship between the activity A of a radioactive sample and the number N of undecayed nuclei?

    <p>A is directly proportional to N</p> Signup and view all the answers

    What is the physical quantity that is related to the frequency f of a charged particle in an electric field?

    <p>Energy</p> Signup and view all the answers

    What is the unit of the energy E in the formula hf = E2 – E1?

    <p>Electronvolts</p> Signup and view all the answers

    What is the physical significance of the decay constant λ?

    <p>It is the probability of decay per unit time</p> Signup and view all the answers

    What is the consequence of the mass-energy equivalence equation E=mc^2?

    <p>Mass can be converted to energy and vice versa</p> Signup and view all the answers

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