AQA Trilogy GCSE Science - Science
Mission Objectives
Describe how electromagnets are used in an electric bell, a circuit breaker, and a relay, identifying their key components and function
Explain the role of electromagnets in each device, detailing how the magnetic field interacts with mechanical components to complete or break a circuit
Compare the use of electromagnets in these applications, discussing similarities and differences in their operation and purpose
Save files related to this lesson
Words and meanings to learn
solenoid
a coil of wire that produces a magnetic field when an electric current passes through it. When wrapped around an iron core, it enhances the strength of an electromagnet
relay switch
an electrically operated switch that uses a small current in one circuit to control a larger current in another circuit via an electromagnet
electric bell
a device that uses an electromagnet to repeatedly attract a metal arm, which strikes a bell to produce sound
circuit breaker
a safety device that automatically breaks the circuit if the current becomes too large; it protects electrical circuits from damage caused by overcurrent or short circuits
electromagnet
a temporary magnet created when an electric current flows through a coil of wire, usually wrapped around an iron core; the magnetism is lost when the current is switched off
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!
Electric bell/relay and circuit breaker as a demo.
Expert film
Mission assignment film
Unlock expert-designed lessons, resources, and assessments tailored for educators. No credit card required.
Claim Your Free Trial →
