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Static Current Circuits Applications Calculations Surprise

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Static 100 PointsStatic 100 Points

QuestionQuestion: :

Static electricity builds up on what type of Static electricity builds up on what type of materials?materials?

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AnswerAnswer::Insulators

Static: 200 PointsStatic: 200 Points

QuestionQuestion: : How do charged objects become neutralized?

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AnswerAnswer::

They are brought in contact with the ground.They are brought in contact with the ground.

Static: 300 PointsStatic: 300 Points

QuestionQuestion: :

Why does a charged balloon stick to a neutral wall?Why does a charged balloon stick to a neutral wall?

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AnswerAnswer::

The balloon induces a positive charge on the The balloon induces a positive charge on the surface of the wall.surface of the wall.

Static: 400 PointsStatic: 400 Points

QuestionQuestion: :

Describe how lightning works?Describe how lightning works?

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AnswerAnswer::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 PointsCurrent : 100 Points

QuestionQuestion: :

Current electricity means that electrons are Current electricity means that electrons are __________.__________.

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AnswerAnswer::

flowingflowing

Current: 200 PointsCurrent: 200 Points

QuestionQuestion: :

A battery is the source of electrical _________.A battery is the source of electrical _________.

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AnswerAnswer::

energyenergy

Current: 300 PointsCurrent: 300 Points

QuestionQuestion: :

Describe what happens to the current if an identical Describe what happens to the current if an identical load is added in series with the first load.load is added in series with the first load.

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AnswerAnswer::

The current is reduced in half.The current is reduced in half.

Current : 400 PointsCurrent : 400 Points

QuestionQuestion: :

How is current created?How is current created?

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AnswerAnswer::

A turbine in a generator spins to create electric flow A turbine in a generator spins to create electric flow by some means (steam, wind, water, etc.).by some means (steam, wind, water, etc.).

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Circuits: 100 PointsCircuits: 100 PointsQuestionQuestion: : What is the schematic drawing of a simple circuit with a 4 cell battery, 2 lights in series and a switch.

AnswerAnswer::

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Circuits: 200 PointsCircuits: 200 PointsQuestionQuestion: : When lights are connected in parallel branches, how does the total voltage compare to the voltage drop across each light?

AnswerAnswer::

They are all the sameThey are all the same

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Circuits : 300 PointsCircuits : 300 PointsQuestionQuestion: :

How must ammeters and voltmeters be connected How must ammeters and voltmeters be connected in a circuit and what do they measure?in a circuit and what do they measure?

AnswerAnswer::

Ammeters – in series, measure current in ampsAmmeters – in series, measure current in ampsVoltmeter – in parallel, measure voltage drop in Voltmeter – in parallel, measure voltage drop in voltsvolts

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Circuits: 400 PointsCircuits: 400 PointsQuestionQuestion: : Describe what a short circuit is and what can happen?

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A short circuit is a circuit without a load which can A short circuit is a circuit without a load which can lead to electrical fires.lead to electrical fires.

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Applications: 100 PointsApplications: 100 Points

QuestionQuestion: :

What does a lightning rod do?What does a lightning rod do?

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AnswerAnswer::

Safely transmits the electrons to the ground Safely transmits the electrons to the ground through the conducting wire.through the conducting wire.

Applications: 200 PointsApplications: 200 Points

QuestionQuestion: :

Describe how electrostatic spray paint works?Describe how electrostatic spray paint works?

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AnswerAnswer::

The paint is given a charge and the thing being The paint is given a charge and the thing being painted is given the opposite charge so less paint is painted is given the opposite charge so less paint is wasted.wasted.

Applications: 300 PointsApplications: 300 Points

QuestionQuestion: :

What electrical device prevents houses or building What electrical device prevents houses or building from catching on fire do to electricity?from catching on fire do to electricity?

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AnswerAnswer::

A circuit breaker or a fuse.A circuit breaker or a fuse.

Applications: 400 PointsApplications: 400 Points

QuestionQuestion: :

How can consumers make informed decisions How can consumers make informed decisions about what appliance to buy?about what appliance to buy?

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AnswerAnswer::

Compare their EnerGuide labels.Compare their EnerGuide labels.

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Calculations: 100 PointsCalculations: 100 Points

QuestionQuestion: :

What is the resistance of a light bulb if a 6 V battery What is the resistance of a light bulb if a 6 V battery produces a 0.6 A current through the bulb?produces a 0.6 A current through the bulb?

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AnswerAnswer::

10 Ω10 Ω

CalculationsCalculations: 200 Points: 200 Points

QuestionQuestion: :

What is the power rating of a toaster if it takes 1 What is the power rating of a toaster if it takes 1 minute and 40 seconds to use 100 KJ of energy.minute and 40 seconds to use 100 KJ of energy.

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AnswerAnswer::

1 KW1 KW

CalculationsCalculations: 300 Points: 300 Points

QuestionQuestion: : If an electric stove uses 15 000 J of energy to produce 12 000 J of heat, how efficient is the stove?

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AnswerAnswer::80%

CalculationsCalculations: 400 Points: 400 Points

QuestionQuestion: : 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.

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AnswerAnswer::

$3.46$3.46

SurpriseSurprise: 100 Points: 100 Points

QuestionQuestion: : When you touch a neutral object with a negatively charged rod, what charge does the object get?

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AnswerAnswer::

NegativeNegative

SurpriseSurprise: 200 Points: 200 Points

QuestionQuestion: : How does a Van DeGraff Generator Work?

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AnswerAnswer::

The rotating belt picks up electrons by friction and The rotating belt picks up electrons by friction and transfers them to the metal ball where they can transfers them to the metal ball where they can spread out which then transfer to whatever touches spread out which then transfer to whatever touches it.it.

SurpriseSurprise: 300 Points: 300 Points

QuestionQuestion: : 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.

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AnswerAnswer::

The florescent light bulbs are more efficient so you The florescent light bulbs are more efficient so you will save money on your electrical bill in the long will save money on your electrical bill in the long run.run.

SurpriseSurprise: 400 Points: 400 Points

QuestionQuestion: : Name one advantage and one disadvantage of series and parallel circuits?

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AnswerAnswer::

Series - easy to wire but if one light goes out they Series - easy to wire but if one light goes out they all go out.all go out.Parallel - more difficult to wire but can control each Parallel - more difficult to wire but can control each electrical load individually.electrical load individually.

Final Jeopardy!Final Jeopardy!• Question: • How many joules in 1 KWh?

• Answer:• 3 600 000 J

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