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Chapter 2
Study Guide
Words to know and understand their meaning (Lessons 1-3)
Magnet – any material that attracts iron or materials containing iron
Magnetic Pole – on of two points, such as the ends of a magnet, that have opposing magnetic
qualities
Magnetic Force – the force of attraction or repulsion generated by moving or spinning electric
charges
Magnetic Field – the region around a magnet in which magnetic forces act
Ferromagnet – a mixture of metals with strong magnetic properties
Temporary Magnet – made of materials that are easily magnetized but lose their magnetization
easily
Permanent Magnet – made of materials that are hard to magnetize but keep their magnetic
properties longer (they can stay magnetized)
Auroras – atoms in the air become excited and create a beautiful array of lights, can be seen at
both the geographic North Pole and geographic South Pole
Electromagnetism – the interaction between electricity and magnetism
Solenoid – a coil of wire with an electric current
Electromagnet - made of a solenoid (coil of wire) that has an iron core and acts as a magnet
when an electric current is in the coil
Galvanometer – measures electric current in a wire
Electromagnetic Induction – the process of creating a current in a circuit by changing the
magnetic field
Recap of Chapter content
Lesson 1 –
What are the properties of magnets? Magnetic Force, Magnetic Field, and they have two poles
(North and South)
In order for a material to be magnetic, it depends on the materials_Atoms.
What can be done to a magnet to cause it to lose it’s magnetic properties? High temperatures &
dropping it really hard
As electrons move, what do they make? Magnetic Field
What is a compass needle made from? A magnet
When you cut a magnet apart, what do you end up with? Two magnets, each with both a North
and South Pole
How can you make a nail a magnet? Rub one pole of a magnet in one direction on the nail
and line up the domains.
What can be made visible with iron fillings? The magnetic field lines
Lesson 2 –
Who discovered Electromagnetism? Hans Christian Oersted
When was electromagnetism discovered? In 1820
How can a solenoid’s magnetic field be strengthened? Increase the number of loops per meter
and increase the electric current
What contains a coil of wire and a soft iron core that acts as a magnet? Electromagnet
How are solenoids and electromagnets alike/different? Both solenoids and electromagnets
contain a coil of wire. The difference is that an electromagnet has a soft iron core.
When an electric current is no longer flowing through an electromagnet, what is no longer
available? The magnetic field
Lesson 3 –
Faraday’s Experiment – he hoped the magnetic field would make an electric current in the
second wire of his experiment (See Figure 1 on pg. 54)
What happened to the galvanometer in Faraday’s Experiment? The galvanometer pointer
moved when the magnetic field was changing.
When a battery was connected to Faraday’s experiment, what type of device was created? An
electromagnet
What was the process of creating a current by changing the magnetic field called?
Electromagnetic induction