Question

Which of the following are likely to be affected by a magnet?

A. A credit card
B. An access card you scan for entry into a building
C. A CD
D. A DVD

Answer 1

A magnet can attract certain materials called ferromagnetic materials, but credit cards, access cards, CDs, and DVDs are not likely to be affected by magnets.

Step-by-step explanation:

A magnet can attract certain materials, called ferromagnetic materials, such as iron and nickel. Credit cards, access cards, CDs, and DVDs do not contain ferromagnetic materials, so they are not likely to be affected by a magnet. Instead, these items use other methods, such as electromagnetic induction or optical scanning, to store and retrieve information.