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Magnetic Materials Quiz

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Questions and Answers

Which type of materials are easily magnetised but the induced magnetism is usually temporary?

Magnetically hard materials

Iron-based materials

Magnetically soft materials (correct)

Alloy materials

What are the main elements used to create permanent magnets from magnetically hard materials?

Copper, zinc, silver, gold, and platinum

Iron, aluminium, nickel, cobalt, and rare earth elements (correct)

Oxygen, nitrogen, carbon, hydrogen, and sulfur

Lead, mercury, arsenic, cadmium, and antimony

What happens to magnetically hard materials when magnetised by a strong external magnetic field?

They lose their magnetism immediately

They remain magnetised indefinitely (correct)

They become temporarily magnetised

They emit their own weak magnetic field

What can demagnetise magnetically hard materials?

<p>An opposing magnetic field</p> Signup and view all the answers

Which type of materials are attracted by magnets and can be magnetised to create permanent magnets?

<p>Materials that can be magnetised</p> Signup and view all the answers

Magnetic Materials Quiz

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Questions and Answers

Which type of materials are easily magnetised but the induced magnetism is usually temporary?

What are the main elements used to create permanent magnets from magnetically hard materials?

What happens to magnetically hard materials when magnetised by a strong external magnetic field?

What can demagnetise magnetically hard materials?

Which type of materials are attracted by magnets and can be magnetised to create permanent magnets?

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