You're in a room with 2 iron bars

[cragar]

You're in a room with 2 iron bars. One is a magnet and the other is not.
How do you tell which one is the magnet? You have nothing but the iron bars to test this.

 

[DaveC426913]

Balance one across the other, like a +. If the magnetic one is on top it will prefer to point in a specific direction.

 

[Jimmy Snyder]

Spoiler

Form a T shape. The behavior of the magnet near the poles should be different from the behavior near the middle of the bar.

 

[cragar]

very good , can anyone tell me y i am getting warned for posting this.

 

[Vanadium 50]

very good , can anyone tell me y i am getting warned for posting this.

You should PM the mod who warned you.