Worksheet: Positrons

In this worksheet, we will practice describing the properties of positrons, the differences between positrons and electrons, and the differences between matter and antimatter.

Q1:

The diagram shows an electron and a positron colliding. The two particles are destroyed and a high-energy photon is created. What is the name given to this process?

  • ARayleigh scattering
  • BCompton scattering
  • CPair production
  • DScintillation
  • EAnnihilation

Q2:

Which of the following statements correctly describe the similarities and differences between electrons and positrons?

  1. Electrons and positrons have different masses.
  2. Electrons and positrons have opposite electric charges.
  3. Electrons and positrons have the same mass.
  4. Electrons and positrons have the same electric charge.
  • Ab and c
  • Ba and d
  • Ca and c
  • Dc and d
  • Eb and d

Q3:

What particle is the antiparticle of the electron?

  • AThe positron
  • BThe photon
  • CThe pi meson
  • DThe proton
  • EThe neutron

Q4:

What particle is the antiparticle of the positron?

  • AThe proton
  • BThe electron
  • CThe photon
  • DThe neutrino
  • EThe neutron

Q5:

What is the relative charge of a positron?

  • A0
  • B 2
  • C+2
  • D+1
  • E 1

Q6:

The antiparticle of a particle has the same as that particle but has an opposite .

  • Aelectric charge, magnetic moment
  • Bmagnetic moment, spin
  • Celectric charge, spin
  • Dmass, magnetic moment
  • Emass, electric charge

Q7:

Which of the following symbols denotes a positron?

  • A 𝛽
  • B 𝛽
  • C 𝑝
  • D 𝑏
  • E 𝐵

Q8:

Which of the following particles has the same electric charge as a positron?

  • AA neutrino
  • BA neutron
  • CAn electron
  • DA proton
  • EA photon

Q9:

Which of the following symbols denotes a positron?

  • A 𝑛
  • B 𝛽
  • C 𝑝
  • D 𝑒
  • E 𝑒

Q10:

When a positron collides with an electron, the two particles will be destroyed and a number of photons will be produced. What is the name given to this process?

  • ACompton scattering
  • BDecimation
  • CPair production
  • DAnnihilation
  • EDestruction

Q11:

The electric charge of an electron is 1.6×10 coulombs. What is the electric charge of a positron, in coulombs?

  • A0 C
  • B 3 . 2 × 1 0 C
  • C 3 . 2 × 1 0 C
  • D 1 . 6 × 1 0 C
  • E 1 . 6 × 1 0 C

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