Electromagnet

What is NOT a way to increase the strength of an electromagnet?

• decrease the number of coils

• use a stronger battery

• use a stronger magnet

• increase the number of coils

How can you test to see if an electromagnet is stronger after adding more coils of wire?

• if it picks up fewer paperclips

• compass still points toward the electromagnet when moved further away

• if it picks up the same number of paperclips

• compass still points toward the electromagnet when moved closer

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Which of these would make an electromagnet stronger?

• Loosening the coiled wire

• Removing the power source

• Tightening the coiled wire

• Using a non-metal core

Which of the following best describes how a hydroelectric dam works?

• Water is heated up and the boiling water produces electricity.

• Water falls, causing a turbine of permanent magnets to spin around an electromagnet generating electricity.

• Water evaporates into clouds and the static electricity between the clouds is captured.

• Water flows through a tube at a constant rate producing electrical charges.

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Iron, Nickel and cobalt are all __________________ materials

• Shiny

• poles

• magnetic

• cold

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Which of the following is not a necessary part of an electromagnet?

• Soft metal core

• Motor

• Coiled Wire

• Power source

What is the primary function of an electromagnet?

• To convert electrical energy into mechanical energy

• To store electrical energy

• To convert mechanical energy into electrical energy

• To generate static electricity

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Which material is commonly used as the core of an electromagnet to enhance its magnetic field?

• Plastic

• Wood

• Iron

• Glass

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What happens to the magnetic field of an electromagnet when the current is increased?

• It decreases

• It remains the same

• It increases

• It disappears

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NGSS.MS-PS2-3

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Which of the following is NOT a component of a basic electromagnet?

• Battery

• Coiled wire

• Permanent magnet

• Iron core