AQA Trilogy GCSE Science - Science
Mission Objectives
Explain how an AC generator works
Explain how and why the induced potential difference from an AC generator and a DC dynamo varies over time
Explain how microphones work and how they use the generator effect
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Words and meanings to learn
induced
when a voltage (potential difference) or current is generated in a conductor because it is moved through a magnetic field, or when a magnetic field around the conductor changes
potential difference
the energy transferred per unit charge between two points in a circuit; it is also called voltage and is measured in volts (V)
amplitude
the maximum displacement of a wave from its rest position; it indicates the wave’s energy - a larger amplitude means a more powerful wave
frequency
the number of complete waves (or cycles) that pass a point per second; it is measured in hertz (Hz)
dynamo
a device that converts kinetic energy (motion) into electrical energy using electromagnetic induction; it generates a direct current (DC) when a coil of wire rotates within a magnetic field
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!
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