Electromagnetic Induction

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

• around the wire.

• parallel to the wire.

• under the wire.

• through the wire.

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The faster the magnet moves through the coil

• the stronger the induced current

• the weaker the induced current

• there is no change in the current

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Electromagnetic induction

• is the ability of an electric current to create an magnetic field AND the ability of a magnetic field to create an electric current.

• ability of magnets to create an electric field

• show that magnets have north and south poles and nothing more

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

• Electricity is a form of magnetism.

• Magnetism is a form of electricity.

• Electricity can be converted to magnetism and vice versa.

• They are not closely related at all.

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In physics, to "induce" something is to:

• Make it more powerful

• Create it

• Turn it into something else

• Reverse its direction

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Electrical generators move ______ to create an electrical current.

• protons

• circuits

• magnets

• miniature farm animals

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

• gas stove

• flashlight

• digital watch

• refrigerator

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Which of the following principles is the basis for electromagnetic induction?

• Faraday's Law

• Newton's Third Law

• Ohm's Law

• Coulomb's Law

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In an experiment, a coil is moved rapidly through a magnetic field. What is the observed effect?

• The coil heats up

• An electric current is induced in the coil

• The coil becomes magnetized

• The coil changes color

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Which device uses electromagnetic induction to convert mechanical energy into electrical energy?

• Electric motor

• Transformer

• Generator

• Battery