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Chapter 32 Electrostatics
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The net charge of a dipole is
How is Coulomb's law similar to Newton's law of gravitation?
both are inverse square laws
both involve attracting and repelling forces
Induction is the charging of an object without...
not touching it
What is the conservation of charge?
According to Coulomb's law, a pair of charged particles that are placed twice as close to each other will experience forces
four times as strong
twice as strong
If electrons are rubbed from cat's fur onto a rubber rod, does the rod become positively or negatively charged?
What are the three ways to charge an object? (neglecting the possible charge by polarization)
Which of these has the least inertia?
When you brush your hair and scrape electrons from your hair, your hair
becomes negatively charged
becomes positively charged
When you scuff electrons off a rug with your shoes, your shoes are then
If a cloud is negatively charged on its bottom and equally positive on its top, the net charge on the cloud is
Unlike Newton's law of gravity, Coulomb's law involves
the inverse- square law
a fundamental physics law
a proportionality constant
repulsive as well as attractive forces
The predominant carrier of charge in copper wire is the
The proportionality constant k in Coulomb's law is huge in ordinary units, whereas the proportionality constant G in Newton's law of gravitation is tiny. What does this mean in terms of the relative strengths of these two forces?
electrical force is generally much less
electrical force is generally much greater
The primary purpose of a lightning rod is to
attract lightning strokes
prevent lightning strokes
decrease the energy of lightning
What is the SI unit of charge?
Materials through which electric charge can flow are called
As a pair of charges are brought closer together, the amount of force between them
decreases only if the charges are of opposite signs
increases only if the charges are of opposite signs
The net charge of an atom is
number of protons
number of protons and neutrons
zero if the atom is electrically neutral
If an atom has lost at least one proton, the atom is a ___________ ion.
If an atom has lost one or more electrons, it is a _____________ ion.
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