Magnetism and Magnetic Materials

Which of the following materials have strongly aligned magnetic moments at the atomic level and can be permanently magnetized?

• Aluminum

• Iron

• Wood

• Water

Which type of magnetic materials exhibit weak attraction to magnets and have some unpaired electrons with magnetic moments?

• Ferromagnetic Materials

• Paramagnetic Materials

• Diamagnetic Materials

• Steel

What are the two distinct poles of a magnet called?

• North Pole and South Pole

• East Pole and West Pole

• Positive Pole and Negative Pole

• Up Pole and Down Pole

Which of the following is NOT an application of magnetism?

• Electric generators

• Magnetic resonance imaging (MRI) machines

• Compasses for navigation

• Chemical reactions

How can magnetization be achieved using an electrical method?

• By hammering a red hot steel bar

• By placing a piece of un-magnetized steel near a magnet

• By connecting a steel bar to a solenoid with an electric battery

• By heating a magnet

What is the process called when a magnet is made to lose its magnetism?

• Magnetization

• Demagnetization

• Induced magnetism

• Magnetic resonance

Which method of demagnetization is the most efficient?

• Electrical method

• Mechanical method

• Heating method

• None of the above

Which material is easily magnetized but readily loses its magnetism?

• Steel

• Iron

• Aluminum

• Copper

What is the main category of magnetic materials that are the basis for most everyday magnets?

• Ferromagnetic Materials

• Paramagnetic Materials

• Diamagnetic Materials

• Steel

What is the process called when a piece of un-magnetized steel is placed near or in contact with a pole of a magnet and then removed?

• Magnetization

• Demagnetization

• Induced magnetism

• Magnetic resonance