Question

copper and brass are examples of ________ materials.
a. ferromagnetic
b. ceramic
c. diamagnetic
d. paramagnetic

Explanation:

Analyze the magnetic properties of copper and brass

Using the Diamagnetism and Magnetic Materials knowledge points

• Copper is a classic example of a diamagnetic material, which is weakly repelled by a magnetic field.
• Brass, being an alloy primarily composed of copper and zinc (both of which are diamagnetic), also exhibits diamagnetic behavior.
• Therefore, copper and brass are classified as diamagnetic materials.

Evaluate the given multiple-choice options

Using the Magnetic Materials knowledge point

• Option a (ferromagnetic) is incorrect because ferromagnetic materials (like iron, nickel, and cobalt) are strongly attracted to magnetic fields.
• Option b (ceramic) is incorrect because copper and brass are metallic alloys/elements, not ceramics.
• Option c (diamagnetic) is correct because both copper and brass exhibit weak repulsion to magnetic fields.
• Option d (paramagnetic) is incorrect because paramagnetic materials are weakly attracted to magnetic fields, unlike copper and brass.

Answer:

• a. ferromagnetic
• b. ceramic
• c. diamagnetic (Correct answer)
• d. paramagnetic