English National Curriculum - 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
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
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
frequency
the number of complete waves (or cycles) that pass a point per second; it is measured in hertz (Hz)
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)
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