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Example: Doubly charged ions of mass 4.80 x 10-26 kg pass undeflected through the velocity selection chamber of a mass spectrometer. The velocity selector has an E field of 3.80 x 105 V/m and a magnetic field of 0.950 T. After leaving the velocity selector the ions enter the ion separation region and are deflected by a different B field. If the radius of curvature of the ions is 6.00 x 10-2 m, what is the B field strength in the separation region. . left chamber, containing both E and B fields, Enet = Felectric + Emagnetic = g.Eleft + quBleft right chamber, with no E field and a separate B field (unrelated to the Bleft), F = qvBright Fcentripetal = mv2/r is the force required to keep anything moving in a circle Equating these gives m(E/B)left = gr Bright Simulation Questions: 1. If the E field (only present in the left chamber, adjusted via the top menu) is pointing up to the top of the screen, what direction of B field is required to counteract the deflection of a positive ion injected into the chamber? 2. Fill in this table of E and B values (including sign) that maintain a straight path for an ion passing through the left chamber to reach the hole in the middle dividing wall: Speed to the right v=1.0 m/s v=2.0 m/s v=3.0 m/s v=4.0 m/s E field positive B field for straight E field negative B field for straight