Magnetic Force Study Guide

In this image, matching north poles from two magnets are introduced.  What do you predict will be the outcome?

• There will be no interaction.  The poles of magnets do not have an effect on one another.
• There will be a field of repulsion, and they will move away from each other

• There will be a field of attraction, and they will move towards each other

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If you wrap more coils around an electromagnet, it will become 

• brighter
• stronger
• weaker
• invisible

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How can the strength of an electromagnet be increased? (mark all that apply)

• increase the current flowing through the coil

• increase the number of coils

• add an amplifier to it

• put iron core inside the coil

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The strongest parts of the magnet are ...

• fronts

• backs

• poles

• middle

What type of core is best for electromagnets?

• Steel

• Iron

• Plastic

• Copper

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Samantha wants to make her electromagnet stronger. First, she uses 20 coils and a battery. Then, she tries again with more coils and a stronger battery. The magnet picks up more paperclips, but she isn’t sure why.

What was her mistake?

• She changed two variables at once, so she doesn’t know which one made it stronger.

• She didn’t test it enough times.

• She should have used fewer coils.

• Paperclips aren’t a good way to measure strength.

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The force of magnetism is stronger when magnets are ________________

• cold
• round
• closer together
• farther apart

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Magnetic force between two magnets gets weaker the more ________________ between them.

• distance
• attraction
• metal
• lightsabers

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A magnetic field of a magnet gets_____________the further magnetic object moves away from the magnet

• Positive

• Negative

• Stronger

• Weaker

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Which claim does Jordan's evidence support?

• Electromagnets do not have magnetic fields.

• A magnetic force is stronger closer to a magnet.

• Plastic is a non-metal.

• Magnetic fields are stronger further away from the magnet.