Electromagnetic Induction BrainPOP

Which of the following is a true statement?

• a. Hans Orsted and Michael Faraday competed to be the first scientist to describe electromagnetic induction

• b. Orsted and Faraday were colleagues who worked together to discover electromagnetic induction

• c. Orsted stole Faraday's ideas about electromagnetic induction, leading to controversy d. Faraday built on Orsted's discoveries to describe electromagnetic induction

• d. Faraday built on Orsted's discoveries to describe electromagnetic induction

When an electric current runs through a wire, a magnetic field is induced …

• a. Around the wire

• b. Parallel to the wire

• c. Under the wire

• d. through the wire

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3. In physics, to "induce" something is to:

• a. Make it more powerful

• b. Create it

• c. Turn it into something else

• d. Reverse its direction

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4. What is the relationship between electricity and magnetism? Choose the best answer.

• a. Electricity is a form of magnetism.

• b. Magnetism is a form of electricity.

• c. They are two forms of the same basic force.

• d. They are not closely related at all.

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5. Two electromagnets contain the same types of magnets and wires. But the magnet in the first moves much faster than the second. Therefore:

• a. The first electromagnet has a more powerful current than the second

• b. The first electromagnet has a less powerful current than the second

• c. The currents in the two electromagnets run in opposite directions

• d. The current in the first electromagnet moves faster than the current in the second electromagnet

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6. Which of the following devices is most likely to contain an electromagnet?

• gas stove

• flashlight

• digital watch

• refrigerator

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7. You're going camping, and you need a source of electric current. So, you buy a gasoline-powered:

• a. Motor

• b. Generator

• c. Inducer

• d. Electromagnet

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8. What do you need to build a working electric motor?

• a. An extremely large magnet

• b. Fuel that can be burned

• c. A wire that's at least 5 meters long

• d. A source of electricity

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What might happen if transformers didn't exist?

• a. The electricity in your house might have an extremely high voltage

• b. Electricity could not be distributed through power lines to people's homes

• c. Electricity could not be created at power plants

• d. The direction of the electric current in your home might switch back and forth

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10. How would you reverse the direction of the current flowing through the coil in Faraday's experiment?

• a. Use a magnet of opposite polarity

• b. Move the magnet through the coil faster

• c. Reverse the magnet's direction

• d. Use a larger magnet

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