Edexcel International A Level Physics

Topic Questions

Particle Interactions & Conservation

1
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Which of the following is a fundamental particle?

  • atom

  • baryon

  • neutrino

  • pion

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2
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Which of the following is a fundamental particle?

  • antiproton

  • muon

  • neutron

  • pion

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3
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In 2015, a pentaquark was discovered.

The pentaquark was made of 5 quarks, straight c comma space straight c with bar on top comma space straight d comma space straight u comma space straight u.

The pentaquark can form a baryon-meson combination.

Which row of the table shows a possible arrangement of the quarks?

      Quarks in baryon Quarks in meson
  A straight d space straight u space straight u straight c space straight c with bar on top
  B straight u space straight c with bar on top space straight u straight d space straight c
  C straight c with bar on top space space straight u straight d space straight u space straight c
  D straight u space straight d straight c space straight c with bar on top space straight u

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1
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Which of the following is the quark structure for a straight pi to the power of minus particle?

  • d d d

  •  stack u u d with bar on top

  • u with italic bar on top d 

  • u d

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2
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Which row in the table gives the charge and mass of an antiproton?

  Charge / C Mass / kg
A 1.6 × 10−19 −9.11 × 10−31
B –1.6 × 10−19 9.11 × 10−31
C 1.6 × 10−19 −1.67 × 10−27
D –1.6 × 10−19 1.67 × 10−27

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3
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Neutrinos can interact with protons to create neutrons.

Which of the following equations shows this process?

  • nu subscript e space plus space p space rightwards arrow space e to the power of plus space plus space n

  • nu subscript e space plus space p space rightwards arrow space e to the power of – space plus space n

  • nu with bar on top subscript e space plus space p space rightwards arrow space e to the power of plus space plus space n

  • nu with bar on top subscript e space plus space p space rightwards arrow space e to the power of – space plus space n

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