Ten Facts about Magnets
(from the book Driving Force) 1. North poles point north, south poles point south. 2. Like poles repel, unlike poles attract. 3. Magnetic forces attract only magnetic materials. 4. Magnetic forces act at a distance. 5. While magnetized, temporary magnets act like permanent magnets. 6. A coil of wire with an electric current flowing through it becomes a magnet. 7. Putting iron inside a current-carrying coil increases the strength of the electromagnet. 8. A changing magnetic field induces an electric current in a conductor. 9. A charged particle experiences no magnetic force when moving parallel to a magnetic field, but when it is moving perpendicular to the field it experiences a force perpendicular to both the field and the direction of motion. 10. A current-carrying wire in a perpendicular magnetic field experiences a force in a direction perpendicular to both the wire and the field. The Tricky Triangle Solve this by placing a magnetic marble in each hole. You'll find it;s very difficult and addictive. Tumbling Monkey The monkey stays on the track because of the magnets on the axis of the wheel. They are strong enough to hold the wheel to the track when its moving. But when gravity and friction slow the wheel down enough to allow centripetal force to overpower the magnetic force, it will fly off the rails on the outside curve farthest from the handle.
3 Comments
5/31/2015 06:06:41 pm
Education is the imperative element of our life that gives us the alertness about the guidance and organization of our workers who are person with extraordinary needs. Education helps us to be aware of the problems.
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6/27/2017 11:09:14 pm
I was lucky enough to have known some facts about magnets since it became one of the many topics we had discussed when I was still a high school student. Actually, I don't know everything about it. There are some trivia posted in your website that's fresh to me, and I am glad to know all of these. By the way, I was able to read "Driving Force" too. It was a cool book!
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11/18/2019 11:57:17 pm
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