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Physics Grade 11 Unit 7: NUCLEAR PHYSICS

national exam questions have come from this unit. It runs 46 pages; one careful study pass takes about 5.4 hours, and its difficulty is harder among Physics units. Each section below lists the questions set from it, with the year, and opens the page that teaches it.

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7.1 The nucleus · read p. 288
  • 2018 E.C., Q40 – What is the binding energy of the nucleus of helium 42He? (Mass of 42He = 4.002603 u, mp = 1.007900 u, mn = 1.008665 u, 1 u = 931.1 MeV)
  • 2017 E.C., Q56 – Which one of the following statements is correct about the fundamental forces in nature and their applications?
  • 2016 E.C., Q39 – One of the four fundamental forces of nature acting over long distances and purely attractive is
  • 2014 E.C., Q16 – The graph of nuclear binding energy per nucleon (BE/A) versus mass number (A) has its peak near an atomic weight A = 56. Which of the following statements is true about the graph?
  • 2012 E.C., Q22 – Which one of the following is true about fundamental forces?
  • 2010 E.C., Q38 – In Rutherford experiment, a beam of positively charged alpha particles was projected in to a thin piece of a gold foil. One of the observation of this experiment is that some charged particles deflected through a large a
7.2 Radioactivity · read p. 299
  • 2018 E.C., Q38 – Radioactivity is defined as:
  • 2015 E.C., Q40 – Electrons in a Sodium atom emit radiation when they move from a higher energy level of -0.81eV to a lower energy level of -2.21eV. What is the frequency of radiation emitted in the process?
  • 2011 E.C., Q44 – When ultraviolet light is shone on a clean metal surface the surface will emit electrons. What is the necessary precondition for electrons to be ejected from the metal surface is ?
  • 2009 E.C., Q22 – The activity of radioactive substance reduces from $2000\mathrm{Bq}$ to $1000\mathrm{Bq}$ in $10^6$ seconds. What is the decay constant?
  • 2008 E.C., Q34 – Which statements is Not correct about emission from radioactive isotopes?
  • 2006 E.C., Q35 – The half-life of radium 224 is 3.5 days. What fraction of the sample remains undecided after fourteen days? (if needed use $\ln 2 = -\ln(1/2) \approx 0.693$)
7.3 Use of nuclear radiation · read p. 312
Not asked in a national paper yet.
7.4 Nuclear Reaction and Energy Production · read p. 316
  • 2011 E.C., Q45 – Complete the following equation which represents a nuclear fission reaction. What is the particle represented by 0 1 n → Rb + 95 139 Cs + 2X + energy 235 U + X? ?
7.5 Safety Rules Against Hazards of Nuclear Radiation · read p. 323
Not asked in a national paper yet.