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A mass spectrometer, sketched below, is a device used to separate different ions. Such ions with a well-defined velocity Vo enter through a slit into a region of uniform magnetic field B, where they follow a semicircular path until they strike the detector slit above the entry slit. The distance between the entry and the detector slits is d = 1.30 m.
1. [1pt]
Chlorine ions of mass 35 amu (1 amu equals 1.66x10-27 kg), carrying a charge of +1e, enter the spectrometer with initial speed of vo = 3.40E5 meters/sec. What value of B is required for these ions to hit the detector?
Answer: Last Answer: -.095 T
Incorrect, tries 4/99.
I tried: r=mv/(qB) => B= mv/(qr)
B= (5.81 x 10^-26 kg x 3.40 x 10^5 m/s) / (1.60 x 10^-19 C x 1.30 m)
B= .0950 T
where did i go wrong?
1. [1pt]
Chlorine ions of mass 35 amu (1 amu equals 1.66x10-27 kg), carrying a charge of +1e, enter the spectrometer with initial speed of vo = 3.40E5 meters/sec. What value of B is required for these ions to hit the detector?
Answer: Last Answer: -.095 T
Incorrect, tries 4/99.
I tried: r=mv/(qB) => B= mv/(qr)
B= (5.81 x 10^-26 kg x 3.40 x 10^5 m/s) / (1.60 x 10^-19 C x 1.30 m)
B= .0950 T
where did i go wrong?