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26 Nov 2019

Since iron filings are not themselves magnets, by what mechanism do they align themselves with a magnetic field ?

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Irving Heathcote
Irving HeathcoteLv2
7 Sep 2019
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

a) Which of the following statements about magnetic fields is true?

Ā 
Magnetic field lines point in towards the north pole of a magnet.
Ā 
None of these.
Ā 
Magnetic field lines point outward from the north pole of a magnet.
Ā 
Magnetic field lines point outward from the south pole of a magnet.
Ā 
There are no magnetic field lines outside the magnet.
Ā 
There are no magnetic field lines unless iron filings are present.
Ā 
Ā 
b)Ā What is an acceptable ending to the following sentence: ā€œMagnetic field linesā€¦ā€
Ā 
Are not present without iron filings.
Ā 
Form closed loops.
Ā 
Can cross each other.
Ā 
None of these.
Ā 
Originate from monopoles.
Ā 
All of the above.
Ā 
Ā 
c) Which of the following arrangements produces an attractive force?
Ā 
South Pole to South Pole
Ā 
Magnets never attract each other, only iron filings.
Ā 
South Pole to North Pole
Ā 
North Pole to North Pole
Ā 
All of these.
Ā 
None of these.
Ā 

Please answer the following questions about magnetic fields.

a)Ā Which of the following statements about magnetic fields are true?Ā sig.gif?tid=8C84-AA-63-48-8A6B-12417

1.Ā Magnetic field lines point in towards the north pole of a magnet.

2.Ā None of these.

3.Ā Magnetic field lines point outward from the north pole of a magnet.

4.Ā Magnetic field lines point outward from the south pole of a magnet.

5.Ā There are no magnetic field lines outside the magnet.

6.Ā There are no magnetic field lines unless iron filings are present.

b)Ā What is an acceptable ending to the following sentence: ā€œMagnetic field linesā€¦ā€Ā sig.gif?tid=8C84-AA-63-48-8A6B-12417

1.Ā Are not present without iron filings.

2.Ā Form closed loops.

3.Ā Can cross each other.

4.Ā None of these.

5.Ā Originate from monopoles.

6.Ā All of the above.

c)Ā Which of the following arrangements produces an attractive force?Ā sig.gif?tid=8C84-AA-63-48-8A6B-12417

1.Ā South Pole to South Pole.

2.Ā Magnets never attract each other, only iron filings.

3.Ā South Pole to North Pole.

4.Ā North Pole to North Pole.

5.Ā All of these.

6.Ā None of these.

Ā 

Ā 

Ā 

Ā 

Ā 

Ā 

Ā 

Ā 

Ā 

Ā 

Ā 

Noting that the magnetic field lines of a bar magnet resemble the electric field lines of a pair of equal and opposite charges, do you expect the magnetic field to rapidly decrease in strength with distance from the magnet? Is this consistent with your experience with magnets?Ā 

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