This video allows students to carry out an experiment on the IV characteristics of a filament bulb from home. This is a required practical for students to be able to understand and carry out for GCSE Physics.
A filament bulb (or filament lamp) is connected to a variable power supply. The potential difference across the bulb is changed in steps of approximately 2V and the values for potential difference and current are taken. Students can pause the video in order to take their own readings. The bulb is also connected in the opposite direction such that the potential difference has negative values as well. We can plot the potential difference against the current on a graph in order to investigate the IV characteristics of the bulb. We can also calculate the resistance by dividing the potential difference by the current.
The full results as well as a blank table for students to fill in using the video can be found here:
Thanks for watching,
Lewis
Relevant for GCSE Physics 9-1 in the following exam boards:
AQA (including Trilogy)
Edexcel
OCR A
OCR B
WJEC
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