When a filament bulb is first switched on, its metal filament is cold and so has a relatively low resistance. This leads to a large surge current until the filament heats sufficiently to glow white hot with a steady electrical current. This essay investigates the research question: “How does the final current affect the surge current time in a filament bulb?” The surge current time is the time interval between switching the bulb on and when the final steady current is first reached.
This file was published by IBO, and it lists how candidates did on each section of the marking criterion. Suggests improvements for future candidates and includes the marking scheme for 3 example EEs. The ultimate guide to the Physics EE and worthwhile to leaf through to make sure you don't make the same mistakes. (Not my original file)
An EE sample in Physics.
Research Question: How do changes in impact velocity of a spherical ball bearing affect the size of craters left in a sand landing area?
Learn from the mistakes that have been done and make your EE
Hope it helps you.
The comparison of two different playing techniques in terms of sound spectrums in the Finnish national instrument kantele.
By Henna Tahvanainen
The abstract is in English and Finnish. Everything else is in English.