Fields Between Permanent Magnets
Superposition of magnetic fields between like and unlike poles
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School Block YouTube?
When alternating current is exposed to a circular metallic loop it generates electricity and magnetism
C) Magnetic Flux Line Patterns -
(Create Strongest Magnetic Field)
Which diagram is correct?
June 1996
N,N or N,S?
Jasmine Kerby - 2009
N, S
Review - Is the right pole N or S?
Show Me The Physics
 Enrichment Using magnets to repel crocodiles - Reuters
A crocodile observes at the water surface Feabruary 2, 2005. REUTERS/Carlos Barria
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Check Your Understanding
5 quick questions — pick an answer to see if you’re right.
1. A north pole faces a south pole. What do the flux lines between them do?
2. Which arrangement of two bar magnets creates the strongest magnetic field in the gap between them?
3. Two north poles face each other. Which statement about the flux lines between them is correct?
4. Which rule about magnetic flux lines is always true?
5. A compass is placed in the gap between a north pole and a south pole. Its north end points:
Fields Between Two Magnets
Students sprinkled iron filings around two bar magnets placed end to end with a small gap between them. In Setup 1, a north pole faces a south pole. In Setup 2, two north poles face each other.
Which description of the iron-filing patterns is correct?
▶ Want a challenge? Open 6 more Regents-style questions (harder · mixed formats)
Challenge score: 0 / 6
C1. In Setup 2 the magnets lie along a left–right line, with the gap between them. A force sensor shows that the left magnet pushes on the right magnet with a force of 0.40 N. Choose the direction of the magnetic force that the right magnet exerts on the left magnet, and determine its magnitude.
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C2. A compass is placed exactly halfway between the two north poles in Setup 2. What does it do?
C3. A student makes the following claim.
Place a check mark in either the Support or Refute box. Justify your response.
C4. Place a check mark in two boxes to indicate the arrangements that would produce a neutral point (where the fields cancel) in the gap between two identical magnets.
C5. Which application uses a strong, nearly uniform field between unlike poles?
C6. Identify the evidence in the iron-filing patterns that shows the magnetic field in the gap of Setup 1 is stronger than the field at the middle of the gap in Setup 2.