Can You Identify Which Iron Bar is Magnetic Without Any Tools?

Click For Summary

Homework Help Overview

The discussion revolves around identifying which of two identical iron bars is magnetic without the use of any tools or apparatus. The subject area includes concepts of magnetism and properties of materials.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore creative methods to differentiate between a magnetized and unmagnetized iron bar. Some express uncertainty about how to approach the problem without tools, while others suggest examining the magnetic field characteristics.

Discussion Status

The discussion is ongoing, with participants sharing their thoughts and ideas. Some have provided hints and suggestions to guide the original poster's thinking, while others are still grappling with the problem and seeking further clarification.

Contextual Notes

Participants note that this question is part of a larger set of homework problems, and some express frustration over the difficulty of this particular question compared to others. There is an acknowledgment of the need for creativity in problem-solving.

greener1993
Messages
40
Reaction score
0
1. How can something travel faster than light?

2. You have two identical bars of iron – except that one is a magnet. Without using any piece of apparatus, or any other object, how can you find out which is which?


Hope you can help

Thankyou :)
 
Physics news on Phys.org
As to your first question http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/FTL.html" this explains many ways you can.

question 2 ) good luck! :)
 
Last edited by a moderator:
greener1993 said:
1. How can something travel faster than light?

2. You have two identical bars of iron – except that one is a magnet. Without using any piece of apparatus, or any other object, how can you find out which is which?
What do you think? Show what you've done so far.
 
Not a clue for question 2. Been thinking for 3 weeks on this (3 week homework) and still have no idea. Of course i have ideas with using appratus but i don't have a clue without appratus.

with question 1 cdubsean gave me that nice website that i need to look at in detail. But yet again i just have no clue what its all about.

Theses questions came from a set of 10. told they were A level. managed to work out most of them but just can't seem to swing my head around theses ones
 
If you had a bar of unmagnetized iron and a identical looking bar magnet, what could you do with them? Be creative!
 
hey doc al saw what you wrote on my other topic... giving me the answer is completely useless. ofcourse.

This is a 3 - 4 weeks homework with about 20 questions on it, I've done all but 1... this one ofc. Been thinking about it the second i got the paper. iv put plenty of thought into it.

Unfortanlly i don't have a clue on hte question, just starting AS physics and the cretivness needed and the understanding given in my 12 lesson is not at the right level at the moment.

Maybe you can give me a clue to get me starting thinking on the correct lines.
 
Hint: Where is the magnetic field of a bar magnet greatest?
 
The magnets are strongest on both sides (poles) what I am thinking of is there is no magnetic field in the middle of theses 2 poles. Calling magets 1 and 2 i would try the center of bar 1 against the end of bar 2. then see if there is a force. let's say there is a force in this one so bar 2 would be the magnet. If we used the end of bar 1 on the center of bar 2 we would expect to see no force and therefor the poles on bar 1 are not magnetic.

Just an idea... correct? on the right lines? or miles off?
 

Similar threads

Determine the force with which the magnetic field of a coil acts on an infinitesimal cube of iron
  • · Replies 6 ·
Replies
6
Views
1K
Test Magnetic Properties of Iron Bars
  • · Replies 1 ·
Replies
1
Views
1K
Identifying three identical metal bars (with your eyes closed )
  • · Replies 2 ·
Replies
2
Views
2K
Flux of Circuit made from Metal Bar on Parallel Rails
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What are the possible states of cold iron balls?
  • · Replies 2 ·
Replies
2
Views
3K
What Are the Magnetic and Quantum Effects in These Physics Scenarios?
  • · Replies 2 ·
Replies
2
Views
3K
With two provided metals, find which one is the magnet.
  • · Replies 8 ·
Replies
8
Views
10K
Justifying Ampere's Law and Faradays Law with an experiment
  • · Replies 1 ·
Replies
1
Views
1K
How Can You Identify the North Pole of a Bar Magnet Without Another Magnet?
  • · Replies 9 ·
Replies
9
Views
7K
Rotating bar hanging on a spring (oscillation)
  • · Replies 26 ·
Replies
26
Views
4K