Name _____________________
Period
_______
Electrostatics Worksheet
𝑭=𝒌
𝒒𝟏 𝒒𝟐
𝒅𝟐
𝒌 = 𝟗𝒙𝟏𝟎𝟗 𝑵 · 𝒎𝟐 /𝑪𝟐
𝑬 = 𝑭/𝒒
µ  x10-6
1. Calculate the electrostatic force between two point charges (+1.6µC and -2.9 µC) that are 3.5
meters apart.
2. How far apart are two charges if you know they each are +2.0 C and the force between them is
8.5x108 N?
3. Calculate the charge on Particle A if you know Particle B = 25.0 µC, the electric force between
A and B is -2160 N, and the distance between A and B is 25 mm.
4. A sphere has a charge of -17.0µC. You place a test charge of +0.9µC 0.5 m away from the
sphere.
a.
Draw the electric field around the sphere, and label the test charge.
b. Calculate the force that the test charge experiences.
c.
Calculate the electric field at the test charge.
d. Calculate the strength of the electric field if the distance between the sphere and the test
charge is tripled to 1.5 m.
5. Draw electric field lines for the following situations.
a.
q
b.
+
q
c.
+
-
q
q
d.
+
+
q
q
-
-
q
q
e.
f.
+
+
q
q
q
g.
+
+
q
q
+
+
q
q
h.
+
q
q
q
+
q