Electromagnets

What is a magnet?

• An object that conducts electricity

• An object that has 2 poles and exerts a force

• A device that stores energy

• A material that reflects light

Which of the following is a ferromagnetic material?

• Copper

• Aluminum

• Iron

• Plastic

What force is associated with magnetism?

• Gravitational force

• Magnetic force

• Nuclear force

• Frictional force

What is the molecular property common to magnets?

• Conductivity

• Magnetism

• Transparency

• Elasticity

What are magnetic forces produced by?

• Electric currents

• Magnetic poles

• Gravitational fields

• Chemical reactions

What poles does every magnet have?

• East and West

• Positive and Negative

• North and South

• Top and Bottom

What do electrons in atoms do?

• Only orbit

• Only spin

• Both orbit and spin

• Neither orbit nor spin

What is one way to create a temporary magnet?

• Heat the object

• Rub the surface of a magnet

• Freeze the object

• Submerge in water

What should you do to an object to make it temporarily magnetic by using a magnet's pole?

• Heat the object

• Touch the object to the pole of a magnet

• Submerge in water

• Wrap with a wire carrying an electric current

What is a solenoid?

• A type of battery

• A cylindrical coil of wire acting as a magnet

• A type of iron core

• A plastic insulator