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In a mass spectrometer, ions of same charge but different mass enter perpendicular to uniform B with same velocity. Radii of circular paths are:
AAll equal
BProportional to MASS (heavier ions trace larger circles)
CProportional to charge
DProportional to time
Answer & Solution
Correct answer: B. Proportional to MASS (heavier ions trace larger circles)
r = mv/(qB). With same v, q, B, radius is proportional to m. Heavier ions follow larger circles. This is how mass spectrometers separate ions by mass-to-charge ratio.
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