IB Physics EE Example 1 (28/34)

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This Physics Extended Essay scored 28/34 (Grade A) under the new 2018 IB Extended Essay marking criteria and was written by a 42/45 student who scored a Grade 7 in Physics HL in the November 2025 session.

Topic: Magnetic field strength and DC motor speed.

Title: Investigating the relationship between magnetic field strength and brushed DC motors.

Research Question: To what extent does varying permanent magnetic field strength (𝜇𝑇) impact the operational rotational speed (𝑟𝑎𝑑/𝑠) of a manually constructed brushed DC motor?

This essay is a fantastic example of the structure of the EE as well as the level of research required to obtain a Grade A in the Extended Essay. Any student hoping to achieve an A in their Physics EE should consider this essay as a model.

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