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Study
Electricity and Magnetism
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Neutrons have a
neutral charge
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The constant movement of electrons between atoms is called
electric current
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What can attract magnetic objects through other substances?
magnets
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Earth's magnetic field protects us from
solar radiation
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What determines if a substance is magnetic or not?
The direction of an orbit
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The magnetosphere extends from the
north pole to the south pole
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Name two common electromagnetic inventions
high speed trains, electric bells, speakers and microphones
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In order to produce electricity, a force is needed to make an electron
leave its orbit
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What is an example of a magnetic material that attracts magnets?
iron
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What is the magnet in shape of a rectangular bar called?
bar magnet
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Who called his invention an electrodynamic rotary device?
Faraday
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When an electron leaves its orbit, the atom becomes
positively charged
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The study of how electricity and magnetism are related and how the interact with each other is called
electromagnetism
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The first electric motor is also called a
dynamo
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The north pole is .... charged
positively
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What charges don't repel each other?
a positive and a negative charge
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The north pole of the needle is ..... to the magnetic north pole of the Earth
attracted
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Permanent magnets have
two poles
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We can identify a magnetic by testing if is ......
is repelled by another magnet
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The magnetic north pole of the Earth is actually the. .... of the magnetosphere
South pole
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Protons have a
positive charge
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Iron fillings can be used to show ........... of the magnetic field
the location and direction
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In a stable atom there are the same number of
protons and electrons
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What is an invisible force between two magnetic objects?
Magnetism
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A nucleus has
neutrons and protons
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The magnetic field is ........ near the poles
stronger
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The red end of the needle of a compass will always point
north
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The .......... is attracted to the electromagnet and hits the bell
hammer
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Which magnets can't be switched on or off?
Bar/Permanent magnets
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Who noticed that an electric current affects a compass needle?
Oersted
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All matter is made up of ....
atoms
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Particles with the same electric charge
repel each other
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Electrons have a
negative charge
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Who discovered the electrodynamic molecule now called the electron?
Ampere
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The magnetosphere protects life on Earth by ............ solar radiation.
deflecting
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A magnet that moves can produce electricity with a
turbine
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The centre of the Earth is made of
liquid iron
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This is an example of an
electric circuit
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Many modern inventions use
electromagnets
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What is this diagram called?
a magnetic field
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What train uses magnets to levitate and move forward?
maglev
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Who discovered that electricity and magnetism are related?
Oersted
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