The student presents a well-structured extended essay that effectively addresses a clear and focused research question regarding the relationship between magnetic field strength, power input, and the rotational speed of a DC motor. The research allows for a critical analysis rather than a descriptive response, supported by a thorough statistical analysis using the Pearson correlation coefficient. The independent and dependent variables are clearly defined, justified, and measured using appropriate SI units, ensuring clarity and precision throughout the investigation. Furthermore, the methodology is described in sufficient detail for replication, and the results are presented in a standardized format with clear labeling, contributing to the overall coherence and academic rigor of the essay.
