An electron is accelerated from rest through potential difference V and then enters a region of uniform magnetic field, where it undergoes uniform circular motion. The figure gives the radius r of that motion versus V¹/2. The vertical axis scale is set by rs= 4.0 mm, and the horizontal axis scale is set by V-¹/²= 32.9 V₁/2. What is the magnitude of the magnetic field? (ww) 0 VI/2 V1/2 (¹/2)

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Chapter1: Units, Trigonometry. And Vectors
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Chapter 28, Problem 020
An electron is accelerated from rest through potential difference V and
then enters a region of uniform magnetic field, where it undergoes
uniform circular motion. The figure gives the radius r of that motion
versus V¹/2. The vertical axis scale is set by rs= 4.0 mm, and the
horizontal axis scale is set by V¹/2= 32.9 V¹/2. What is the magnitude of
the magnetic field?
r (mm)
VI/2
V¹/2 (¹/2)
Transcribed Image Text:Chapter 28, Problem 020 An electron is accelerated from rest through potential difference V and then enters a region of uniform magnetic field, where it undergoes uniform circular motion. The figure gives the radius r of that motion versus V¹/2. The vertical axis scale is set by rs= 4.0 mm, and the horizontal axis scale is set by V¹/2= 32.9 V¹/2. What is the magnitude of the magnetic field? r (mm) VI/2 V¹/2 (¹/2)
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