Which of the following materials is ferromagnetic?

Correct answer: (b) Nickel

Explanation

Ferromagnetic materials are strongly attracted by a magnet and can be magnetised themselves. The common ones are iron, cobalt and nickel (and alloys such as steel).

• Manganese and aluminium are paramagnetic: only weakly attracted.
• Gold, copper and wood are diamagnetic: very weakly repelled.