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IB Physics HL E.5.2 Fusion in stars Question Bank

Practise IB Physics SL/HL E.5.2 by applying fusion in stars concepts to exam-style physics questions.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • identify the relevant physical quantity, model or diagram
  • apply the correct equation and units to the evidence
  • justify the result using conservation laws, fields or energy relationships

E.5.2—Fusion in stars question 1

[Maximum number: 1]

Three stars A, B and C are labelled on the Hertzsprung-Russell (HR) diagram. L⊙L_{\odot} is the Luminosity of the sun.

Figure for Question E.5.2—Fusion in stars question 1 — IB Physics HL

State the main element that is undergoing nuclear fusion in star C .

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