QUESTION 10 What is the radius of the electrons' trajectory, in millimeters, in Example 22.2 if the speed is doubled and the strength of the magnetic field is halved?
QUESTION 10 What is the radius of the electrons' trajectory, in millimeters, in Example 22.2 if the speed is doubled and the strength of the magnetic field is halved?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:QUESTION 10
What is the radius of the electrons' trajectory, in millimeters, in Example 22.2 if the speed is doubled
and the strength of the magnetic field is halved?

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EXAMPLE 22.2
physics.xl
Calculating the Curvature of the Path of an Electron Moving in a Magnetic Field: A Magnet on
a TV Screen
A magnet brought near an old-fashioned TV screen such as in Figure 22.21 (TV sets with cathode ray tubes instead of LCD
screens) severely distorts its picture by altering the path of the electrons that make its phosphors glow. (Don't try this at home,
as it will permanently magnetize and ruin the TV.) To illustrate this, calculate the radius of curvature of the path of an electron
having a velocity of 6.00 × 10' m/s (corresponding to the accelerating voltage of about 10.0 kV used in some TVs)
perpendicular to a magnetic field of strength B = 0.500 T (obtainable with permanent magnets).
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Figure 22 21 Side viewI showing wbat bannenS when a madnet
comes in contact with a computer monitor or TV screen Flectrons moving
16
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