Final Jeopardy StaticCurrentCircuitsApplicationsCalculations Surprise

Static 100 Points Question: Static electricity builds up on what type of materials? Back Answer: Insulators

Static: 200 Points Question: How do charged objects become neutralized? Back Answer: They are brought in contact with the ground.

Static: 300 Points Question: Why does a charged balloon stick to a neutral wall? Back Answer: The balloon induces a positive charge on the surface of the wall.

Static: 400 Points Question: Describe how lightning works? Back 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 __________. Back Answer: flowing

Current: 200 Points Question: A battery is the source of electrical _________. Back Answer: energy

Current: 300 Points Question: Describe what happens to the current if an identical load is added in series with the first load. Back Answer: The current is reduced in half.

Current : 400 Points Question: How is current created? Back 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 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 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? 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

Applications: 100 Points Question: What does a lightning rod do? Back Answer: Safely transmits the electrons to the ground through the conducting wire.

Applications: 200 Points Question: Describe how electrostatic spray paint works? Back Answer: The paint is given a charge and the thing being painted is given the opposite charge so less paint is wasted.

Applications: 300 Points Applications: 300 Points Question: What electrical device prevents houses or building from catching on fire do to electricity? Back Answer: A circuit breaker or a fuse.

Applications: 400 Points Question: How can consumers make informed decisions about what appliance to buy? Back 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? Back Answer: 10 Ω

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. Back Answer: 1 KW

Calculations : 300 Points Question: If an electric stove uses J of energy to produce J of heat, how efficient is the stove? Back Answer: 80%

Calculations : 400 Points 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. Back Answer: $3.46

Surprise : 100 Points Surprise : 100 Points Question: When you touch a neutral object with a negatively charged rod, what charge does the object get? Back Answer: Negative

Surprise : 200 Points Surprise : 200 Points Question: How does a Van DeGraff Generator Work? Back 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.

Surprise : 300 Points 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. Back Answer: The florescent light bulbs are more efficient so you will save money on your electrical bill in the long run.

Surprise : 400 Points Surprise : 400 Points Question: Name one advantage and one disadvantage of series and parallel circuits? Back 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.

Final Jeopardy! Question: How many joules in 1 KWh? Answer: J Back