Static

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Static
Current
Circuits
Applications
Calculations
Surprise
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Static 100 Points
Question Static electricity builds up on what
type of materials?
Answer Insulators
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Static 200 Points
Question How do charged objects become
neutralized?
Answer They are brought in contact with the
ground.
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Static 300 Points
Question Why does a charged balloon stick to a
neutral wall?
Answer The balloon induces a positive charge on
the surface of the wall.
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Static 400 Points
Question Describe how lightning works?
Answer The friction in the cloud builds up
enough charge to induce a positive charge on the
ground that jumps in the form of a spark when the
charge is great enough.
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Current 100 Points
Question Current electricity means that
electrons are __________.
Answer flowing
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Current 200 Points
Question A battery is the source of electrical
_________.
Answer energy
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Current 300 Points
Question Describe what happens to the current
if an identical load is added in series with the
first load.
Answer The current is reduced in half.
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Current 400 Points
Question How is current created?
Answer A turbine in a generator spins to create
electric flow by some means (steam, wind, water,
etc.).
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Circuits 100 Points
Question What is the schematic drawing of a
simple circuit with a 4 cell battery, 2 lights in
series and a switch.
Answer
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Circuits 200 Points
Question When lights are connected in parallel
branches, how does the total voltage compare to
the voltage drop across each light?
Answer They are all the same
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Circuits 300 Points
Question How must ammeters and voltmeters be
connected in a circuit and what do they
measure?
Answer Ammeters in series, measure current in
ampsVoltmeter in parallel, measure voltage
drop in volts
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Circuits 400 Points
Question Describe what a short circuit is and
what can happen?
Answer A short circuit is a circuit without a
load which can lead to electrical fires.
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Applications 100 Points
Question What does a lightning rod do?
Answer Safely transmits the electrons to the
ground through the conducting wire.
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Applications 200 Points
Question Describe how electrostatic spray paint
works?
Answer The paint is given a charge and the thing
being painted is given the opposite charge so
less paint is wasted.
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Applications 300 Points
Question What electrical device prevents houses
or building from catching on fire do to
electricity?
Answer A circuit breaker or a fuse.
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Applications 400 Points
Question How can consumers make informed
decisions about what appliance to buy?
Answer Compare their EnerGuide labels.
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Calculations 100 Points
Question What is the resistance of a light bulb
if a 6 V battery produces a 0.6 A current through
the bulb?
Answer 10 O
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Calculations 200 Points
Question What is the power rating of a toaster
if it takes 1 minute and 40 seconds to use 100 KJ
of energy.
Answer 1 KW
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Calculations 300 Points
Question If an electric stove uses 15 000 J of
energy to produce 12 000 J of heat, how efficient
is the stove?
Answer 80
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Calculations 400 Points
Question What does it cost to have a 60 W light
bulb on for one entire 30 day month, assume the
rate is constant at 0.08/KWh.
Answer 3.46
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Surprise 100 Points
Question When you touch a neutral object with a
negatively charged rod, what charge does the
object get?
Answer Negative
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Surprise 200 Points
Question How does a Van DeGraff Generator Work?
Answer The rotating belt picks up electrons by
friction and transfers them to the metal ball
where they can spread out which then transfer to
whatever touches it.
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Surprise 300 Points
Question Why is it better to pay for more
expensive florescent light bulbs compared to
incandescent light bulbs when they really produce
about the same amount of light.
Answer The florescent light bulbs are more
efficient so you will save money on your
electrical bill in the long run.
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Surprise 400 Points
Question Name one advantage and one
disadvantage of series and parallel circuits?
Answer Series - easy to wire but if one light
goes out they all go out.Parallel - more
difficult to wire but can control each electrical
load individually.
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Final Jeopardy!

• Question
• How many joules in 1 KWh?
• Answer
• 3 600 000 J

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