IB Physics HL E.4.2 Chain reactions Question Bank
Practise IB Physics SL/HL E.4.2 by applying chain reactions 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.4.2—Chain reactions question 1
[Maximum number: 3]
Outline the reason why fuel enrichment is necessary for the fuel used in a commercial nuclear reactor.
U-235 is (much) more fissionable that U-238 / U-238 is a good absorber of neutrons / U-238 removes neutrons from the reaction / U-238 cannot produce a chain/sustainable reaction;
(naturally occurring) uranium (ore) contains more U-238 (atoms) than U-235 (atoms) / very little U-235 in ore; in fuel enrichment, U-238 is removed / the percentage of U-235 is increased / the ratio of U-235 to U-238 is increased / amount of U-235 increases;
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