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Unit 11: Magnetism Page 11
Objectives
Lesson 2: Electromagnetism
This is one of the most important · Electricity can be caused by a
scientific discoveries of all time: moving magnetic fields.
moving magnets create electricity.
· Electricity is a flow of
Before this, people thought of
electrons.
electricity and magnetism as two
separate things. When scientists · A flow of electrons creates a
realized that not only were they magnetic field.
linked together, but that one · Magnetic fields can cause a
causes the other, then the physics flow of electrons.
really started to fly!
· Magnetic fields can cause
electricity.
In this lesson, we're going to take
a closer look at how magnets
create electricity by building
electromagnets, galvanometers,
motors, relays, telegraphs, and
speakers. Are you ready?
You can get started by watching
this video, and afterward either
read more about it or start your
experiments!
Highlights:
· Magnetism is caused by
moving electrons.
· Electricity is moving
electrons.
· Electricity causes magnetism.
· Moving magnetic fields can
cause electrons to move.
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