True/False
Indicate whether the
statement is true or false.
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1.
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Elements may contain more than one kind of atom.
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2.
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All subatomic particles have a positive or negative electric charge.
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3.
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Rubbing separates charges on atoms.
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4.
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Neutral atoms become charged when they gain electrons.
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5.
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Electric fields surround uncharged particles.
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6.
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Lightning contains only small amounts of electric energy.
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7.
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Chemical energy cannot be changed to electric energy.
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8.
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The dry cell is a source of electricity.
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9.
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Electricity in homes is direct current.
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10.
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Lights connected in parallel have an advantage over those connected in
series.
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Modified True/False
Indicate
whether the statement is true or false. If false, change the identified word or phrase to make the
statement true.
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11.
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A battery used to operate a portable radio or a flashlight is also called a
dry cell.
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12.
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An instrument used to detect a static electric charge is called an
ammeter.
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13.
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A force of attraction exists between particles of the same charge.
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14.
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In a series circuit, there is only one parth for the electrons to
take.
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15.
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As the distance from a charged particle decreases, the strength of the electric
field decreases.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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16.
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1. Atoms are made up of
a. | neutrons only. | c. | molecules | b. | protons and electrons | d. | protons, neutrons, and
electrons. |
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17.
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Protons are described as
a. | lacking charge. | c. | positively charged particles. | b. | negatively charged
particles | d. | neutral
particles. |
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18.
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Neutrons are described as
a. | positively charged particles. | c. | either positively or negatively
charged particles. | b. | negatively charged
particles. | d. | neutral
particles. |
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19.
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Electrons are described as
a. | stationary charges. | c. | nuclear particles | b. | moving charges. | d. | lacking charges |
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20.
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A force of attraction exists between
a. | two protons. | c. | a proton and electron | b. | two
electrons. | d. | two
neurons |
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21.
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Like charges
a. | repel each other. | c. | do not affect each other. | b. | attract each
other. | d. | first attract and
then repel each other. |
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22.
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The number of electrons in a neutral atom equals the
a. | number of neutrons in that atom. | c. | sum of the protons and neutrons in
that atom. | b. | number of protons in that atom. | d. | number of electrons in all other
atoms |
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23.
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When a neutral object gains electrons,
a. | its overall charge is positive | c. | it stays
neutral. | b. | its overall charge is negative.
| d. | it loses the same number of electrons
simultaneously. |
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24.
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Protons and electrons
a. | are free to move. | c. | are equal in number in a neutral atom. | b. | are located in the
nucleus. | d. | all of the
above |
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25.
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When two objects are rubbed together,
a. | one object loses electrons. | c. | both objects lose
electrons. | b. | one object gains electrons.
| d. | one object loses electrons and the other object
gains electrons. |
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26.
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The strength of an electric field
a. | decreases as the distance from a charged particle increases. | c. | decreases as the
distance from a charged particle decreases. | b. | increases as the distance from a charged
particle increases. | d. | is not
affected by the distance from a charged particle. |
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27.
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Static electricity is not produced by
a. | conduction | c. | induction | b. | insulation | d. | friction |
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28.
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Static electricity is described as
a. | electrons in motion. | c. | electrons moving from one object to another and then remaining at
rest. | b. | current | d. | a
flow of electricity. |
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29.
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As a positively charged object touches the knob of an uncharged
electroscope,
a. | the positive charges are transferred to the knob. | c. | free electrons from the knob and
leaves are attracted to the object. | b. | the positive charges are transferred to the
leaves. | d. | the leaves become
negatively charged. |
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30.
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Rubbing a balloon with a piece of cloth is an example of charging an object
by
a. | friction | c. | induction | b. | conduction | d. | reduction |
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31.
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When a glass rod loses electrons as the result of being rubbed with silk,
a. | the charge on the silk is positive. | c. | both rod and silk remain
neutral. | b. | the charge on the glass rod is positive. | d. | the rod becomes charged, but the silk remains
neutral. |
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32.
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Rearrangement of electric charges is the result of charging by
a. | conduction | c. | induction | b. | insulation | d. | friction |
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33.
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A good electrical conductor is
a. | copper | c. | glass | b. | rubber | d. | wood |
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34.
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For induction to occur,
a. | friction is necessary. | c. | no contact is necessary. | b. | conduction is
necessary. | d. | contact is
necessary. |
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35.
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When the metal leaves of an electroscope hang straight down,
a. | the electroscope is uncharged. | c. | an electric charge is
present. | b. | the leaves are repelling each other. | d. | current is passing through the
leaves. |
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36.
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Electric discharge is a
a. | gain in both positive and negative charges. | c. | loss of static
electricity. | b. | gain in static electricity. | d. | loss of positive charges. |
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37.
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Static electricity is defined as
a. | friction between two objects | c. | stationary
electricity. | b. | current | d. | electricity in a circuit. |
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38.
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When static electricity is lost by electric charges moving off an object, there
may be a production of
a. | light | c. | sound and heat. | b. | light and sound. | d. | light, sound, and
heat. |
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39.
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If a negatively charged rubber rod touches the knob of an uncharged
electroscope, the leaves of the electroscope
a. | gain positive charges. | c. | hang straight down. | b. | gain negative charges. | d. | attract each
other. |
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40.
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During electric discharge, an object
a. | loses electrons and loses static electricity. | c. | gains electrons and gains static
electricity | b. | loses electrons and gains static electricity. | d. | gains electrons and loses static
electricity. |
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41.
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The ohm is the unit of measurement for electric
a. | resistance | c. | voltage | b. | current | d. | fields |
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42.
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According to Ohm's law, I =
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43.
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The conducting liquid in a wet cell is called a(an)
a. | paste | c. | electrolyte | b. | electrode | d. | battery |
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44.
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Electrons moving through wires may
a. | flow in one direction only. | c. | change direction and remain that
way. | b. | reverse their direction regularly. | d. | all of the
above |
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45.
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A circuit is in series if
a. | different parts are on separate branches. | c. | electrons have only one path at
all times. | b. | electrons may take several paths. | d. | only one circuit is open and the other
branches are closed. |
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