How does the magnetic flux density impact the magnitude of the braking force due to induced eddy currents for a track of constant dimensions and coefficient of static friction?SL
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A
Official IB Result
IB Grade: A
Criteria A: Focus and Method
4/6
0
3
6
Criteria StrandsPro
A.1Topic clarity and communication
Excellent
A.2Research question formulation and focus
Good
A.3Methodology appropriateness and completeness
Moderate
Criteria Feedback
- The student presents the investigation topic clearly and keeps the overall purpose visible throughout the report.
- The student's research question is explicitly stated and is connected to a meaningful experimental context.
- The student's method shows thoughtful design choices, including repeated trials, a control run, uncertainty treatment, and custom apparatus to manage variables.
- The method is not fully aligned with the exact claim being investigated, so the analysis depends on assumptions that are not securely tested.
- Some important operational details, such as calibration and how terminal motion was selected, need fuller explanation.
- The wording of the research question could be tightened so it matches the quantity the student actually models and analyses.
Criteria B: Knowledge and Understanding
4/6
0
3
6
Criteria StrandsPro
B.1Subject knowledge application
Good
B.2Use of terminology and concepts
Moderate
Criteria Feedback
- The student uses a good range of relevant physics ideas and terminology, including induction, Lenz’s law, Lorentz force, terminal velocity, and uncertainty.
- The student shows a solid understanding of the physical context by connecting the braking effect to magnetic field measurements and motion.
- The student's use of equations and definitions is generally clear and supports the scientific discussion.
- Several conceptual steps are not fully justified, especially when moving from particle-level reasoning to the eddy-current system as a whole.
- Some terms are used imprecisely, such as the resistance model for the moving cart and the use of static friction language.
- A few simplifying assumptions need stronger explanation so the reader can see why they are valid for this apparatus.
Criteria C: Critical Thinking
12/12
0
6
12
Criteria StrandsPro
C.1Research analysis and evaluation
Moderate
C.2Discussion and argument development
Moderate
C.3Critical evaluation
Moderate
Criteria Feedback
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- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Criteria D: Presentation
3/4
0
2
4
Criteria StrandsPro
D.1Structure and formatting
Excellent
D.2Layout and visual elements
Good
Criteria Feedback
- Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.