A velocity selector in a mass spectrometer uses an electric field of 4.4 x 105 V/m. What magnetic field strength (in Tesla) is needed to sel

Question

A velocity selector in a mass spectrometer uses an electric field of 4.4 x 105 V/m. What magnetic field strength (in Tesla) is needed to select a speed of 4.8 x 106 m/s

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Ladonna 4 years 2021-09-02T01:13:28+00:00 1 Answers 22 views 0

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  1. haidang
    0
    2021-09-02T01:14:56+00:00
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    Answer:

      B = 9.16 10⁻²  T

    Explanation:

    The speed selector is a configuration where the electric and magnetic force has the opposite direction, which for a specific speed cancel

           q v B = q E

           v = E / B

           B = E / v

    Let’s calculate

          B = 4.4 10⁵ / 4.8 10⁶

          B = 9.16 10⁻²  T

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