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Experiment 1Electric Field and Electric Potential
Tuesday, August 25th, 2015
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PHY2049L
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Dr. De Huai Chen
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ed d
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Florida Atlantic University
Boca Campus
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Tuesday, September 1st, 2015
This study source was downloaded by 100000829373953 from CourseHero.com on 08-04-2021 15:49:29 GMT -05:00
https://www.coursehero.com/file/12219792/Experiment-1/
, Purpose:
This experiment was designed to demonstrate to students equipotential lines
and electric field lines for 2d charge configurations.
Theory:
An atom consists of positively charged protons, negatively charged electrons
and neutrally charged neutrons. In nature, atoms are normally found with no net
charge, meaning the number of positively charged protons is exactly equal to the
number of negatively charged electrons. However in some instances, an atom can
m
er as
become electrically charged. There are two states of charges an atom can become:
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positive and negative. Because protons are held tightly within the nucleus of an atom
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and cannot be removed, electrons, which exist in a diffuse cloud that orbits around
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the nucleus, determine the final charge of the atom. An atom is negatively charged
when the number of electrons is greater than the number of protons. It is positively
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charged when the number of electrons is less than the number of protons. Charged
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atoms can either attract or repulse one another, creating an electrostatic force. Like
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charges repel, unlike charges attract. The magnitude of an electrostatic force
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between two charged atoms Q and q can be calculated using Coulomb’s law:
(Qq)
is
F=k
r2
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where r is the distance between the two charged atoms, and k is a constant (k = 9.0 x
109 Nm2/C2). Charges within a distance from one another create an electrical field.
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An electrical field is defined as the electrical force per unit charge. The magnitude of
the electrical field a distance r away from the source charge is represented by
This study source was downloaded by 100000829373953 from CourseHero.com on 08-04-2021 15:49:29 GMT -05:00
https://www.coursehero.com/file/12219792/Experiment-1/
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