Transcript Jeopardy - Ms Jilesen

Static
Current
Circuits
Applications
100
100
100
100
100
100
200
200
200
200
200
200
300
300
300
300
300
300
400
400
400
400
400
400
Final Jeopardy
Calculations
Surprise
Static 100 Points
Question:
Static electricity builds up on what type of
materials?
Answer:
Insulators
Back
Static: 200 Points
Question:
How do charged objects become neutralized?
Answer:
They are brought in contact with the ground.
Back
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.
Back
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.
Back
Back
Current : 100 Points
Question:
Current electricity means that electrons are
__________.
Answer:
flowing
Back
Current: 200 Points
Question:
A battery is the source of electrical _________.
Answer:
energy
Back
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.
Back
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.).
Back
Back
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:
Back
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
Back
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 amps
Voltmeter – in parallel, measure voltage drop in
volts
Back
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.
Back
Back
Applications: 100 Points
Question:
What does a lightning rod do?
Answer:
Safely transmits the electrons to the ground
through the conducting wire.
Back
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.
Back
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.
Back
Applications: 400 Points
Question:
How can consumers make informed decisions
about what appliance to buy?
Answer:
Compare their EnerGuide labels.
Back
Back
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 Ω
Back
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
Back
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%
Back
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
Back
Surprise:
100 Points
Question:
When you touch a neutral object with a negatively charged rod,
what charge does the object get?
Answer:
Negative
Back
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.
Back
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.
Back
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.
Back
Final Jeopardy!
• Question:
• How many joules in 1 KWh?
• Answer:
• 3 600 000 J
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