EBK PHYSICS FOR SCIENTISTS AND ENGINEER
6th Edition
ISBN: 9781319321710
Author: Mosca
Publisher: VST
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Chapter 22, Problem 47P
(a)
To determine
The speed of the electron as it impacts the wire.
(b)
To determine
Comparison of speed of electron to final speed of ion as it impacts outside cylinder.
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Question 1
a) In J. J. Thomson experiment (1897), an electron moving horizontally with a
constant speed vo enters in between the horizontal plates of a capacitor. The
electric field strength between the plates of length L and distance d, is E.
The vertical deviation of the electron at the moment of exit from the field
region is measured to be Y. Derive the expression giving the electron's
charge to mass ratio, i.e. e/m to be 2v,Y/CEL). (Recall that Thomson
received Nobel Prize for his achievement.)
b) Calculate e/m, knowing the following data. E=1.6x10* Newton/Coulomb,
L=10 cm, Y=2.9 cm, v=2.19x10* km/s. (Be careful to use coherent units.)
If a proton and electron are released when they are 2.0 m apart, find the initial acceleration of electron (in m/s2).
The answer (in fundamental SI unit) is
(type the numeric value only)
You plan to shock your sibling with an electrostatic charge. To do this, you need to collect electrons from your carpet by rubbing your feet. Your sibling has +8.2 10-6 C excess charge.
(a) What is the minimum amount of electrons you would need to shock your sibling assuming your sibling will be neutral after the shock?(b) What is the minimum mass you will be losing? (kg)
Chapter 22 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
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