WorksheetsUnit 9: Electricity Review
Total questions: 39
Worksheet time: 20mins
The property of material that allows charge to flow is
potential difference
conductivity
resistance
A current that is able to move in both directions is called:
alternating current (AC)
direct current (DC)
voltage current (VC)
inconspicuous current (IC)
An electric current requires which of the following to flow?
closed path
switch
insulator
This potential energy is due to the difference in concentration between electrons within a power source (likea battery):
potential difference (voltage)
current
resistance
Batteries allow which type of current to flow through them?
alternating current (AC)
direct current (DC)
voltage current (VC)
inconspicuous current (IC)
All of the following would make a GOOD conductor of electricity except which
a silver key
a copper wire
a glass window
Insulators, like pastic or rubber, are NOT good conductors of electricity because
they allow charge to flow about half of the time
they allow charge to flow
the allow very little charge to flow
A thin wire will provide more resistance than a thick wire.
True
False
A short wire will provide more resistance than a long wire.
true
false
A cold wire will provide more resistance than a hot wire.
True
False
Which of the following statements best explains why short circuits overheat?
The resistor is increased in a short circuit, thus the electrons more faster and faster, overhearing the circuit.
The resistor is removed in a short curcuits, thus the electrons move slower and slower, overheating the circuit.
The resistor is bypassed in a short circuit, thus the electrons move faster and faster, overheating the circuit.
The resistor is removed in a short circuit, thus no electrical current can flow.
Which of the following statements is TRUE regarding a series circuit?
Any break in a series circuit results in no current.
Series circuits must be operated by at least 3 switches.
The more resistance in a series circuit, the more current will flow.
Which of the following statements is FALSE regarding parallel circuits?
Parallel circuits have multiple paths for the current to travel.
Parallel circuits cannot work if there is one break in the circuit.
Parallel circuits are used often in household circuits.
Most objects are neutral, meaning
the object contains no charges.
the object has an eual amount of positive & negative charges (balanced).
the object has more negative charges than positive charges.
Negative electric charges:
Attract positive charges & repel negative charges.
Repel both positive charges & negative charges.
Repel positive charges & attract negative charges.
If two charges are alike, they will
attract
repel
do nothing
Static electricity involves
a buildup of charges on objects.
a removal of all negative charges from an object.
a constant exchange of protons between objects.
Why does rubbing a balloon on your hair create static charge?
Protons move from the hair to the balloon.
Neutrons move from the hair to the balloon.
Electrons move from the hair to the balloon.
Why is there more static electricity in the winter than in the summer?
There is less humidity in winter, so there is a larger buildup of static charge.
Snowflakes provide a direct pathway for the buildup of static charge.
Frozen water holds more static charge than liquid water.
Dry air is a good ____________ of electricity.
insulator
generator
producer
Lightning is caused by the
extremely hot temperatures within a storm cloud.
extremely cold temperaturers within a storm cloud.
separation of charges within a storm cloud.
The process of separating opposite charges within an object; results in excess electrons and protons on separate sides of the object.
polarization
friction
contact
grounding
Emmett shuffles his socked feet across the carpet. Emmett becomes negatively charged due to
conduction
induction
friction
The process of "draining" excess electrons into the ground
contact
friction
grounding
polarization
A positively charged object...?
has missing electrons
has extra protons
has missing neutrons
has extra positive charges
Dakota touches a negatively charged Van de Graaff machine and becomes negatively charged due to...?
conduction
induction
friction
contusion
The circuit below is an example of a ...?
series circuit
parallel circuit
complex circuit
direct circuit
As drawn, in which diagram (s) show a closed circuit?
Circuit A only
Circuit B only
Both circuits A & B
Neither circuits A nor B
Which of the circuit diagrams below is/are a series circuit? Mark all that apply!
I
II
III
Which of the circuit diagrams below is/are a parallel circuit? Mark all that apply!
I
II
III
In the diagram below, what would happen if light bulb B was removed from its base?
Only light bulb A would go out.
Only light bulb C would go out.
Both light bulbs A and C would go out.
Both light bulbs A and C would stay
Which type of circuit is depicted in the diagram below?
Series circuit
Parallel circuit
Complex circuit
Mega circuit
Which of the devices would remain ON if switches 1 & 3 are closed, while switches 2 & 4 are open?
MARK ALL THAT APPLY.
Device A
Device B
Device C
Device D
None
Which of the devices would remain ON if switches 1, 2 & 3 are closed, while switch 4 is open?
MARK ALL THAT APPLY.
Device A
Device B
Device C
Device D
None
Which switch must be closed in order for any of the devices to work?
Switch 1
Switch 2
Switch 3
Switch 4
If only switch 1 is closed, which light bulb(s) will turn on?
MARK ALL THAT APPLY.
Light bulb B
Light bulb E
Light bulb F
None
If switches 1 & 2 are closed, which light bulb(s) will turn on?
MARK ALL THAT APPLY.
Light bulb B
Light bulb E
Light bulb F
None
Which device(s) would stay on if switches 1, 2, & 3 were closed and switches 4, 5, 6 & 7 were open?
Devices A & B
Devices A, B, & C
Devices A, B, C, & D
Devices A, B, C, D, & E
Which device(s) would stay on if switches 2 & 3 were closed and switches 1, 4, 5, 6 & 7 were open?
Device B & C
Devices A & B
Devices A & C
None of the devices
