Magnetism and Magnets Quiz: 15 Science Questions
Magnetism is an invisible force that has fascinated people since ancient times. From fridge magnets to hospital MRI scanners, it is everywhere in our daily lives. Can you take on this magnetic challenge?
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Frequently asked questions: Magnetism & Magnets
Here is a preview of what awaits you in this magnetism & magnets quiz: 15 multiple choice questions, each with a detailed explanation so you can learn while you play. Here are a few example questions (and their answers, so no peeking before you play!).
Which metal is most commonly used to make permanent magnets?
Answer: Iron. Iron is the ferromagnetic metal par excellence and the one most commonly used in the manufacture of permanent magnets. It can be durably magnetised, unlike copper or aluminium.
Which scientist discovered the relationship between electricity and magnetism in 1820?
Answer: Hans Christian Ørsted. In 1820, Hans Christian Ørsted discovered that an electric current deflects a compass needle, proving the link between electricity and magnetism. This discovery founded electromagnetism.
What is special about neodymium magnets?
Answer: They are the most powerful permanent magnets. Neodymium magnets (NdFeB) are the most powerful permanent magnets commercially available. Made from rare earth elements, they can lift loads several hundred times their own weight.
Which planet in the solar system has the most powerful magnetic field?
Answer: Jupiter. Jupiter has the most powerful magnetic field in the solar system, about 20,000 times stronger than Earth's. It is generated by currents in its core of liquid metallic hydrogen.
At what temperature does a magnet permanently lose its magnetism?
Answer: Above its Curie temperature. Every ferromagnetic material has a Curie temperature above which it permanently loses its magnetism. For iron, this temperature is about 770 °C.
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