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OpenStudy (anonymous):
If the strength of the magnetic field at B is 3 units, the strength of the magnetic field at A is _____. 9 units 12 units 13 units
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OpenStudy (dtan5457):
You would use that 3 and multiply it by 4 so it gets the entire area of (2m)
OpenStudy (anonymous):
so 12?
OpenStudy (dtan5457):
Yea
OpenStudy (anonymous):
thnx
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