Electromagnet and Mechanical Waves

Fluctuating electrical impulses cause the strength of the ____________ to change. This causes the diaphragm and speaker to move at different speeds

• air molecules

• permanent magnet

• electromagnet

• modulation

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NGSS.MS-PS4-1

NGSS.MS-PS3-5

Which is point C on the speaker diagram?

• Permanent Magnet

• Cone

• Electromagnet

• Transistor

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NGSS.MS-ETS1-1

Which wave has the highest frequency?

• 1

• 2

• 3

• 4

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NGSS.MS-PS4-1

waves have to travel through a medium such as a solid, liquid or gas.

• Mechanical waves

• Electromagnetic waves

• Electrical waves

• Molecules

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

Select all of the ways that you can increase the power of the electromagnet below.

• changing the direction of the current moving through the wire

• increasing the size of the iron nail

• increasing the current moving through the wire

• increasing the number of loops of wire

True or False: Electricity can make very strong magnets. These are called electromagnets.

• True

• False

What kind of magnet can be turned on and off?

• refridgerator magnet

• electromagnet

• magnetite

• iron

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NGSS.MS-PS2-3

An iron core with wire with an electric current running through it.

• Energy

• Parallel Circuit

• Electromagnet

• Electrical Energy

How do electromagnetic and mechanical waves compare?

• Mechanical waves can only travel through a vacuum, but electromagnetic waves can travel through a solid, liquid, or gas.

• Mechanical waves can travel through a solid, liquid, or gas, but electromagnetic waves can only travel through a gas.

• Mechanical waves can only travel through a solid, liquid, or gas, but electromagnetic waves can travel through a vacuum.

• Mechanical waves can travel through a solid, liquid, or gas, but electromagnetic waves can only travel through a solid.

Which of the following is a characteristic of mechanical waves?

• They can travel through a vacuum.

• They require a medium to travel.

• They are not affected by the medium.

• They can only travel through solids.