You're in a room with 2 iron bars

  • Thread starter cragar
  • Start date
2,538
1
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.
 
Last edited by a moderator:

DaveC426913

Gold Member
18,154
1,728
Balance one across the other, like a +. If the magnetic one is on top it will prefer to point in a specific direction.
 
Form a T shape. The behavior of the magnet near the poles should be different from the behavior near the middle of the bar.
 
2,538
1
very good , can anyone tell me y i am getting warned for posting this.
 

Vanadium 50

Staff Emeritus
Science Advisor
Education Advisor
22,985
5,252
very good , can anyone tell me y i am getting warned for posting this.
You should PM the mod who warned you.
 

Related Threads for: You're in a room with 2 iron bars

R
Replies
3
Views
2K
Replies
60
Views
8K
  • Posted
Replies
14
Views
2K
  • Posted
Replies
18
Views
24K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top