 |
You are in a room where there are no metal objects except for two iron rods Only one of them is a magnet How can you identify the magnet? |
[Edit] |
Answer
Hang the iron rods on a string and see which one turns to the north (or hang just one rod).
or
Take a rod and touch with its end the middle of the second rod. If they move closer to one another, then you have a magnet in your hand. The real magnet has a magnetic field at its poles, but not in its center. So, as mentioned earlier, if you take the iron bar and touch its tip to the magnet's center the iron bar will not be attracted. This assumes that the magnet's poles are at its ends.
If the poles run through the length of the magnet then it is much more difficult to use this method. In that scenario, rotate one rod around its axis while holding an end of the other to its middle. If the rotating rod is the magnet, the force will fluctuate as the rod rotates. If the rotating rod is not the magnet, the force will be constant (if you keep their positions steady).
First answer by Brave3. Last edit by Vestboy. Contributor trust: 3 [recommend contributor]. Question popularity: 45 [recommend question]
|
Research your answer: |
Answers.com > Wiki Answers > Categories > Science > You are in a room where there are no metal objects except for two iron rods Only one of them is a magnet How can you identify the magnet?
Our contributors said this page should be displayed for the questions below. (Where do these come from ) |
| If any of these are not a genuine rephrasing of the question, please help out and edit these alternates. |
