Suppose someone handed you three similar iron bars and told you one was not magnet but the other two were. How would you find the iron bar that was not magnet?

Q: Suppose someone handed you three similar iron bars and told you one was not a magnet but the other two were. How would you find the iron bar that was not a magnet?

Ans: There are several ways you could identify an iron bar that is not magnetized:

1. Use a magnet: You could use a magnet to see which iron bars are attracted to it. The iron bars that are not magnetized will not be attracted to the magnet.                                                                       
2. Use a compass: You could also use a compass to determine which iron bars are magnetized. When you bring a magnetized object close to a compass, the needle will move away from the north and towards the magnet. If you bring an iron bar close to the compass and the needle does not move, then it is not magnetized.                                                                                                               
3. Perform a hammer test: Another method you could use is the hammer test. Take one of the iron bars and strike it with a hammer. If the iron bar is not magnetized, it will not be attracted to other iron objects when it is struck.                                                                                                                     
4. Use an electromagnet: You could also use an electromagnet to determine which iron bars are magnetized. An electromagnet is a device that generates a magnetic field when an electric current is passed through it. You can use an electromagnet to pick up and move the iron bars, and the ones that are not magnetized will not be affected by the magnetic field.