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Electrostatics: The Distance between Charges Matters
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<strong><font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF">Electrostatics:</font></strong><font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF">
The Distance between Charges Matters</font>
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<font size="4" face="Verdana, Arial, Helvetica, sans-serif">The
interaction between charged particles also depends on how far they
are away from each other. The closer they are, the stronger the
force is. On average, the Coulomb force extends over a remarkably
long distance (microscopically).</font>
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In the following experiment, you will examine how the Coulomb forces are
related to the distance between charges.<br><br><b>What you need to do:</b>
<ol>
<li>
There is a charged particle in the container. The slider on the right
is used to adjust its vertical position in the container.
</li>
<li>
Adjust the position of the particle.
</li>
<li>
Click "Shoot an electron."
</li>
<li>
Observe the trajectory of the electron.
</li>
<li>
Adjust the particle in order to get the electron to hit one of the
targets.
</li>
</ol>
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<strong><font size="4" face="Arial, Helvetica, sans-serif">Press the
"Snapshot" button above to take a snapshot and then follow the
instructions below to drag in an image to prove that you succeeded in
shooting an electron into the blue rectangle.</font></strong>
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<strong><font size="4" face="Arial, Helvetica, sans-serif">Describe where
you placed the particle and why this made the electron move towards the
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<strong><font size="4" face="Arial, Helvetica, sans-serif">Which of the
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of choices C, D, and E.)</font></strong>
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<html>Removing the postively charged particle.</html>
<html>Neutralizing the positively charged particle.</html>
<html>Putting two positively-charged particles of the same amount of charge on the exactly opposite sites about the middle line.</html>
<html>Putting two negatively-charged particlesof the same amount of charge on the exactly opposite sites about the middle line.</html>
<html>Putting two particles of the opposite charges on the exactly opposite sites about the middle line.</html>
<html>Putting a particle with a charge of opposite sign near the particle.</html>
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