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CAIE A-Level Physics 11.1.8 Antiparticles

Practise identifying particle–antiparticle pairs by equal mass and opposite charge, including the positron and electron.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • explain that an antiparticle has the same mass but opposite charge to its corresponding particle
  • identify the positron as the antiparticle of the electron and distinguish particle–antiparticle pairs

11.1.8—An antiparticle has the same mass but opposite charge to the corresponding question 1

[Maximum number: 1]

A proton has mass mpm_{p} and charge +e.
What are the mass and charge of an antiproton?

mass

charge

−mp-m_{\mathrm{p}}

+e

−mp-m_{\mathrm{p}}

-e

mpm_{\mathrm{p}}

+e

mpm_{\mathrm{p}}

-e

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