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MMLU / A beam of electrons has speed 10^7 m/s. It is desired to use the magnetic field…

Problem

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question

A beam of electrons has speed 10^7 m/s. It is desired to use the magnetic field of the Earth, 5 × 10−5 T, to bend the electron beam into a circle. What will be the radius of this circle?

choices

  1. 1 nm
  2. 1 μm
  3. 1 mm
  4. 1 m

subject

high_school_physics

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