Chapter5: Electric Charges And Fields
Section: Chapter Questions
Problem 67P: Consider an electron that is 1010 m from an alpha particle (q=3.21019C) . (a) What is the electric...
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hello can you please help me with part A, PARt B and PART C because I need help with all three parts and can u label which one is which

Transcribed Image Text:Problem 2: An early model of the atom, proposed by Rutherford after his
discovery of the atomic nucleus, had a positive point charge +Ze (the nu-
cleus) at the center of a sphere of radius R with uniformly distributed neg-
ative charge -Ze. Z is the atomic number, the number of protons in the
nucleus and the number of electrons in the negative sphere. Show that the
electric field strength inside this atom is
Ein
=
Ze
4περ
1
a) Fig.2 illustrates the model of the atom. In the figure, draw the Gaussian
surface that you will use to find the field. Draw the vectors that represent lem 2
the electric field at the Gaussian surface. How do you know the direction of
the electric field inside the atom?
Page <
qize
MacBook Air
S-
c) A uranium atom has Z = 92 and R = 0.10 nm. What is the electric field strength at r = R/2?
R
2
FIG. 2: The scheme for Prob-
b) What is the volume charge density p. of the negative sphere? Use Gauss's law and the symmetry
arguments in order to find the expression for the electric field strength inside the atom. What is the electric
field strength outside this atom?
42
2
of 3
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