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What unit is used to measure static magnetic field strength INSIDE the
magnet? - correct answer - Tesla
What unit is used to measure static magnetic field strength OUTSIDE the
magnet? - correct answer - Gauss
1 Tesla = ______________ Gauss - correct answer - 1 Tesla = 1000 gauss
1 mT = _______________ Gauss - correct answer - 1/1,000 T (or 10 (-3)
T) = 10 G
5 G = ___ mT - correct answer - 5 G = 0.5 mT
FDA Guidelines for exposure to magnetic field Adults and infants > 1 mo of
age: - correct answer - 8 T
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FDA Guidelines for exposure to magnetic field for infants < 1 mo of age: -
correct answer - 4 T
What are the 3 Static Magnetic Field Forces? - correct answer - Rotation
Translation
Lenz's forces
Rotational force is ________________ at isocenter - correct answer -
greatest
Rotational / Torque force: - correct answer - Force exerted on an elongated
ferromagnetic object so it aligns with the
direction of the magnetic field
Translational force: - correct answer - Force exerted on a ferromagnetic
object
causing it to move/accelerate toward a
higher magnetic field
Translational force is ___________________ at isocenter - correct answer
- zero
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Translational force is greatest: - correct answer - where the change in the
magnetic field over distance is the greatest - Bo(dB/dx)
Translational forces have a _______________ path (3) - correct answer -
Random, Oscillating and Unpredictable Path
Translational force is expressed with what formula? - correct answer -
Translational Force = B0(dB/dx)
Lenz's Law - correct answer - An induced electromotive force (emf)
always gives rise to a current whose
magnetic field opposes the original
change in magnetic flux
Lenz's Forces are dependent upon - correct answer - Size of the item
Orientation of movement relative to B0
Speed of movement