Question

1. which of the following materials will not form a natural magnet?

iron

nickel

cobalt

platinum

Explanation:

Identify the core question

The question asks which of the listed materials (Iron, Nickel, Cobalt, Platinum) will not form a natural magnet.

Analyze the properties of the given materials

Using the Ferromagnetism and Magnetic Materials knowledge points

• Iron, Nickel, and Cobalt are ferromagnetic materials.
• Ferromagnetic materials have strong magnetic properties and can be magnetized to form permanent or natural magnets.

Evaluate the remaining option

Using the Paramagnetism knowledge point

• Platinum is a paramagnetic material.
• Paramagnetic materials are only weakly attracted by a magnetic field and do not retain magnetic properties when the external field is removed, meaning they cannot form a natural magnet.

Answer:

• Iron
• Nickel
• Cobalt
• Platinum (Correct answer)