Two parallel, current-carrying wires exert forces on each other.
When an electric current flows through a wire, a magnetic field is created around the wire. If you place two current-carrying wires near each other, the magnetic field around each wire exerts a force on the current flowing in the other wire. These forces can push [...]
You can make a magnetic field that’s stronger than the earth’s!
Compass needles are little magnets that are free to rotate. Compasses allow us to observe the direction of a magnetic field. Normally, they respond to the earth’s magnetic field, orienting themselves parallel to magnetic field lines. If we create a magnetic field that is [...]
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