Name___________________ Period_______
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Chapter 16
Section 1 Review, page 563
1.
When a rubber rod is rubbed with wool, the rod becomes
negatively charged. What can you conclude about the magnitude
of
the wool’s charge after the rubbing process? Why?
2.
What did Millikan’s oil-drop experiment reveal about the nature of electric charge?
3.
A typical lightning bolt has about -10.0 C of charge. How many electrons (Remember
for each
electron
q
e
= -1.6 x 10
-19
C) are in a typical lightning bolt?
4.
If you stick a piece of transparent tape on your desk and then quickly pull it off, you
will find
that the tape is attracted to other areas of your desk that are not charged. Why does this happen?
5.
Metals, such as copper and silver, can become charged by induction, while plastic materials cannot. Explain why.
6.
Why is an electrostatic spray gun more efficient than an ordinary spray gun?
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1
st
determine what you need to find
2
nd
determine what variable each number is.
3rd determine which equation to use.
4th solve the equation

Chapter 16, Section 2. Practice A, page
566
These practice problems require the use of the formulas:
1.
A balloon rubbed against
Reese’s
denim jacket & gains a charge of
-8.0
x 10
-6
C. What is the electric force between the balloon and the
denim when the two are separated by a distance of 0.05 m?
(Assume that the charges are located at a point.)
2.
Two identical conducting spheres are placed with their centers 0.30 m apart. One is given a charge
of +12 x 10
-9
C and the other is given a charge of -18 x 10
-9
C.
a.
Find the electric force exerted on one sphere by the other.

3.
Two electrostatic point charges of +60 x 10
-6
C and +50 x 10
-6
C exert a repulsive force on each other of
175 N. What is the distance between the two charges?
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