Electromagnetism Review

All electric charge is based on the ___________ in atoms.

• Protons and Electrons

• Protons and Neutrons

• Neutrons and Protons

• Neutrons and Electrons

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An _______ _______ is a physical property of particles or objects that causes them to attract or repel each other without touching.

• electrical charge

• electrical circuit

• electrical force

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Electric ________ is the attraction or repulsion between charged particles.

• charge

• force

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The strength of an electric force depends on the ___________ of electric charge on the particles and the ______________ between them.

• Amount; distance

• Size; distance

• Type; attraction

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What does magnets repelling mean?

• Magnets move away from each other

• Magnets do not have magnetism

• Magnets move towards each other

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Electromagnetism is a magnetism produced by an electric current.

• True

• False

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Which of the following factors influences the strength of an electromagnet?

• The number of coils

• The amount of current

• The iron core (diameter)

• All the above

How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

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What is true about electricity and magnetic fields?

• Electricity is needed to create any magnet.
• Electricity always creates a magnetic field.
• Electricity is stronger than a magnetic field.
• Electricity prevents magnetic fields from occurring.

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What kind of magnet can be turned on and off?

• refridgerator magnet
• electromagnet
• magnetite
• iron

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