A positively charged object is brought near another object which then becomes positively charged through _____.
convection
ionization
direct contact
induction
2.
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An object touches and electroscope's contact point. The gold leaves spread away from each other, telling you the object _____.
was neutral
had a charge
had a negative charge
had a positive charge
3.
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A lightning rod prevents damage to homes if lightning strikes because the rod is connected to a(n) _____ wire that conducts the electricity into the earth.
open-air receptacle
ground
plastic
insulator
4.
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A conductor can be _____.
rubber
wood
metal wire
plastic
5.
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_____ is (are) a good insulator.
Aluminum foil
Dry wood
Liquids
Water
6.
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An object's state of negativity or positivity in an electric, magnetic, or other field is its _____.
kinetic state
potential state
polarity
ground
7.
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Although held in place by other forces, the two "A" particles tend to _____ each other because of their like charges.
diagram showing helium atoms
join
repel
modify
attract
8.
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Particles labeled "B" inside the helium's atom's nucleus have no charge; they are _____.
diagram showing helium atoms
electrons
protons
ions
neutrons
9.
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If electrons move easily through a substance, then that substance is termed a(n) _____.
solid
gas
insulator
conductor
10.
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You rub a piece of wool upon your skin and your skin becomes negatively charged because it gained _____.
ions
neutrons
electrons
protons
11.
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A substance through which electrons do not readily move is called a(n) _____.
solids
conductor
insulator
gases
12.
Matching.
Two conductors are all
and certain
.
13.
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Particles labeled "C" revolve around the helium atom's nucleus in orbitals; they are _____.
diagram showing helium atoms
electrons
protons
ions
neutrons
14.
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The charge of an "A" particle plus the charge of a "C" particle = _____.
diagram showing helium atoms
zero
15.
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A layer of electrons gathers on the surface of a piece of mica after it is rubbed with copper. The buildup of electrons is called _____ electricity.
Moving
Proton
Electron
Static
16.
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Particles labeled "A" carry positive charges inside the helium's atom's nucleus; they are _____.
diagram showing helium atoms
electrons
neutrons
ions
protons
17.
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You may determine the charge of an object by the use of a(n) _____.
Wimshurst machine
Van de Graaff generator
electroscope
microscope
18.
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Like charges _____.
diagram showing helium atoms
repel
attract
join
modify
19.
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An object may be charged by another object through direct _____ with the second object.
contact
radiation
reaction
insulation
20.
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You may determine the polarity of an object by the use of a(n) _____.
Van de Graaff generator
Wimshurst machine
electroscope
microscope
21.
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If an atom grabbed another atom's electron, both atoms would become _____.
neutrons
protons
electrons
ions
22.
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The net charge of a helium atom equals _____.
diagram showing helium atoms
zero
23.
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The _____—the SI unit of electrical force—is used to express particle's charge.
Ampere
Gram
Newton
Coulomb
24.
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A negatively charged object touches another object, changing its charge through _____.
convection
direct contact
induction
ionization
1 answer
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