SME
Grade 11 Science · Problem type
Magnetic poles and field lines
Use this for “One magnet is turned round. How do the size and direction of the force change?”
Explore
The magnets push apart; the field lines squeeze away from each other.
Assumptions
•
Like poles repel and unlike poles attract; turning one magnet round reverses the force.
•
Turning it round doesn’t change the size of the force: the distance and the magnets are the same.
•
Field lines leave N and enter S. A compass needle’s north end points along them.
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