Untitled Presentation

Multiple Choice

What two forces are required for generators and electric motors to work?

• magnetism and thermal

• electricity and thermal

• electricity and magnetism

• magnetism and radiant

Open Ended

List five electrical precautionary measures or rules.

Multiple Choice

The strength of the magnetic field produced by a flowing current in a wire is affected by:

• The size of the Current
• The distance from the wire
• The number of coils of wire
• All 3

Multiple Choice

Which activity will produce the highest current?

• Move the magnet bar into the coil while the coil remains stationery

• Move the coil into the magnet bar while the magnet remains stationery

• Move the coil and magnet towards each other

• Move the coil and magnet away from each other

Multiple Choice

What components are needed to create an electromagnet as shown in the diagram?

• Iron nail

• Coil of wire

• Battery

• All of the above

Multiple Choice

Temporary magnets lose their magnetism when...

• when they are not near other magnets

• when they are near other magnets

Multiple Choice

What is the purpose of the iron core in an electromagnet?

• To produce electricity

• To concentrate magnetic flux

• To insulate wires

• To cool the electromagnet

Multiple Choice

What role does the wire play in an electromagnet?

• It creates a magnetic field

• It serves as a passage for electric current

• It powers the electromagnet

• It insulates the current

Multiple Choice

The plastic covering on wires is there to:

• Provide a conductor for electrical energy to flow.
• Provide an insulator so that electrical energy will not pass outside of the wires.
• Provide a conductor so that electrical energy can NOT flow.
• Provide an insulator so that electrical energy can flow.

Multiple Choice

What is the role of the power source in an electromagnet?

• To create a magnetic field

• To increase resistance

• To decrease current

• To store energy

Multiple Choice

What are some uses of electromagnets?

• Motors

• Speakers

• Hard disks

• All of the above

Open Ended

Explain how each component of an electromagnet works.