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An investigation into voltage and current, using the Blackpool Illuminations as an example. To light up so many light bulbs, a lot of electrical energy is needed, and to provide this energy, we need a high voltage, or potential difference. The voltage gets the electrons moving, while the current is the rate of the flow of the electrons. The higher the voltage we supply, the greater the current used, and the bigger the current, the brighter the lights.
This clip is from:
First broadcast:
17 May 2007

Classroom Ideas

This clip could be used to introduce the idea of potential difference, how it is related to electrical energy and how it is measured in volts. Students can then relate that the bigger the energy or voltage the brighter the bulbs.

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