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IB Physics HL D 2 3 Charge Conservation Questions

Practise IB Physics HL D.2.3 by solving charge-transfer, particle-reaction and multi-conductor conservation problems.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Apply charge-number conservation to determine particle charge.
  • Calculate final charges after redistribution while conserving total charge.

IB Physics HL D 2 3 Charge Conservation Questions question 1

[Maximum number: 1]

Deuterium, 12H{ }_{1}^{2} \mathrm{H}, undergoes fusion according to the following reaction.

12H+12H→13H+X{ }_{1}^{2} \mathrm{H}+{ }_{1}^{2} \mathrm{H} \rightarrow{ }_{1}^{3} \mathrm{H}+\mathrm{X}

Particle Y is produced in the collision of a proton with a K−\mathrm{K}^{-}in the following reaction.

K−+p+→K0+K++Y\mathrm{K}^{-}+\mathrm{p}^{+} \rightarrow \mathrm{K}^{0}+\mathrm{K}^{+}+\mathrm{Y}

The quark content of some of the particles involved are

K−=u‾ s K0=d s‾\mathrm{K}^{-}=\overline{\mathrm{u}} \mathrm{~s} \quad \mathrm{~K}^{0}=\mathrm{d} \overline{\mathrm{~s}}

Identify, for particle Y , the

charge.

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