- 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 a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders.
Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket, where she's enthusiastically honing her skills both on and off the pitch!
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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