Introduction to Electrodynamics
4th Edition
ISBN: 9781108420419
Author: David J. Griffiths
Publisher: Cambridge University Press
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Textbook Question
Chapter 4.1, Problem 4.1P
A hydrogen atom (with the Bohr radius of half an angstrom) is situatedbetween two metal plates 1 mm apart, which are connected to opposite terminals ofa 500 V battery. What fraction of the atomic radius does the separation distance damount to, roughly? Estimate the voltage you would need with this apparatus toionize the atom. [Use the value of
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A hydrogen atom (with the Bohr radius of half an angstrom) is situated between two metal plates 1 mm apart, which are connected to opposite terminals of a 500 V battery. What fraction of the atomic radius does the separation distance d amount to, roughly? Estimate the voltage you would need with this apparatus to ionize the atom.
If the current in the Helmholtz coils were 1.6 A, rather than 1 A, and the accelerating voltage were still 100 V, what would the radius of the electron's path be? Give your answer in cm, and enter only the number. Blackboard will accept an answer witin 20% of the value it expects.
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(a)The potential of the inner cylinder with respect to the outer cylinder and the electric field follow as:
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(b) Assume the electric field is E =
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b r
145µm , b = 1.8cm . If the radial electric field at a distance of 1.2cm from the axis of
and a =
ln
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the wire is 2 × 10ªV/m The potential difference between the wire and the cylinder is 1060 Volts
(True,False).
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