English National Curriculum - Science
Mission Objectives
Describe the differences between direct current (DC) and alternating current (AC)
Identify and explain the function of the main parts of a UK three-pin plug and electrical cable
Explain how earthing, double insulation and fuses protect users from electric shocks and damage to electrical appliances
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Words and meanings to learn
direct current (DC)
an electric current that flows in one direction only, supplied by batteries and cells
frequency
the number of complete cycles of alternating current per second, measured in hertz (Hz)
earth wire
a safety wire in a plug that connects the metal casing of an appliance to the ground to prevent electric shocks
double insulation
a safety feature where appliances have two layers of insulating material so no live parts can be touched, removing the need for an earth wire
alternating current (AC)
an electric current that repeatedly changes direction; the UK mains supply is AC at 230 V and 50 Hz
Samantha is an accomplished science educator whose current work centres on curriculum design and professional development, supporting teachers to deliver high-quality science education through evidence-informed approaches. She is a former Head of Chemistry and Sixth Form Tutor with extensive Key Stage 4 and 5 experience, and has worked as an AQA examiner, giving her valuable insight into assessment standards and what students need to succeed.
Underpinning this is a strong foundation in applied science built across a range of industry roles. Samantha has held scientific roles at John Smith's Brewery, Yorkshire Water and WasteCare, where she led technical projects, drove operational efficiencies and ensured compliance with industry standards. Across these roles she has first-hand experience of how scientific knowledge translates into measurable outcomes in professional and commercial environments.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket.
National grid demo set up.
Oscilloscope connected to a power pack with AC/DC channels.
Plug wiring class practical: 3-pin plugs, screw drivers, cable, wire cutters, wire strippers.
Expert film
Mission assignment film
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