ElectrostaticsCircuits Current and Voltage Power and Energy Misc. $100 $200 $300 $400 $500

Answer The Law of Electric Charges states that like charges _______one another, unlike charges _______ one another, and charged objects ________ neutral objects.

Back to Jeopardy Back to Jeopardy 1.Repel 2.Attract 3.Sometimes Attract

What type of overall charge does each of the pith balls below have? Would the pith balls below attract, repel or have no effect? Answer

Pith Ball #1 – Negative Pith Ball #1 – Negative Pith Ball #2 – Positive Pith Ball #2 – Positive Attract Attract Back to Jeopardy Back to Jeopardy

Answer Charging by _______ is when two objects are rubbed together and one object loses electrons, the other gains electrons.

Back to Jeopardy Back to JeopardyFriction

Answer Show the movement of electrons when the pith ball is charged by contact Neutral Pith ball and negative strip +--- Charged Pith Ball

Back to Jeopardy Back to Jeopardy Electrons on the pith ball repel from the negative plastic strip. Electron from the plastic strip moves on to the pith ball Negatively charged pith ball

Answer Show the movement of electrons in the pith ball in induced charge separation. Neutral Pith ball and positive acetate strip Pith ball with strip removed

Back to Jeopardy Back to Jeopardy Pith ball and strip attract Neutral

What controls the flow of electrons in an electric circuit? Answer

Back to Jeopardy Back to Jeopardy A switch

Answer What type of circuit has all of it’s parts wired to each other along one path where electrons must go through each load.

Back to Jeopardy Back to Jeopardy A series circuit

Answer In a parallel circuit, the current leaving the source is _______ amongst the branches and the voltage gained at the source is ________ to the voltage drop across each load.

Back to Jeopardy Back to Jeopardy 1.Divided 2.Equal

Answer Draw a schematic diagram of 2 cells in series, 1 closed switch, 1 ammeter and 2 lights in series.

Back to Jeopardy Back to Jeopardy See chalk board for correct answer!

Answer Draw a schematic diagram of 3 cells in series, 1 open switch, 2 lights in parallel and 1 voltmeter measuring the voltage drop across one of the lights.

Back to Jeopardy Back to Jeopardy See chalk board for answer!

Answer Electric current is the ________ at which electrons ________ through a circuit.

Back to Jeopardy Back to Jeopardy 1.Number 2.Pass

Answer Voltage is the amount of _______ _____ an electron gains or loses between two points in a circuit.

Back to Jeopardy Back to Jeopardy Electrical Energy

Answer The ability to slow down the flow of electrons in conductors.

Back to Jeopardy Back to JeopardyResistance

Answer What is the voltage of an ipod, that has a resistance of 5 Ω when the current running through it is 2A?

Back to Jeopardy Back to JeopardyGiven: I = 2AR = 5Ω Unknown: V=? V = I x R V= 2A x 5Ω V = 10 V Therefore the voltage would be 10 V.

Answer What is the resistance of a PS3, if a current of 10A runs through it, when it is connected to a wall outlet (120V)?

Back to Jeopardy Back to JeopardyGiven: V= 120VI = 10A Unknown: R= ? R = V/I R = 120V 10A R = 12 Ω Therefore the resistance would be 12 Ω.

Answer What is the equation for electrical energy?

Back to Jeopardy Back to Jeopardy E = V x I x ∆ t

Answer How much electrical energy is produced by a flashlight powered by a 9V battery with a current of 2A, that stays lit for 1 hour?

Back to Jeopardy Back to JeopardyGiven: V= 18 VI = 2At = 1h Unknown: E = ? E = V x I x t E = 9 V x 2A x 1h E = 18 W h Therefore the energy produced is 18 W h.

Answer A stereo was accidentally left on half a day (12 hrs). If the stereo used 5000Wh of energy, what is the power rating of the stereo?

Back to Jeopardy Back to JeopardyGiven: E=5000W ht=12h Unknown: P=? P=E/t P = 5000 W h 12h P = 416.7W Therefore the power rating for the stereo is W.

Answer If an X-box uses 5kWh of electrical energy and the rate is $0.08/kWh. What is the cost to use the X-box?

Back to Jeopardy Back to JeopardyGiven: E= 5kWhRate = $0.08/kWh Unknown: Cost=? Cost=E x rate Cost = 5 kWh x $0.08/kWh Cost = $0.40 Therefore the cost to use the X-box is $0.40.

Answer What is the percent efficiency of a toaster if the useful energy output is 10000J and the total energy input is 20000J?

Back to Jeopardy Back to JeopardyGiven: Useful energy output = J Total energy input = J Unknown: Percent Efficiency =? % efficiency = Useful energy output x 100% Total energy input Total energy input % efficiency = Jx 100 % % efficiency = Jx 100 % J J % efficiency = 50 % Therefore the % efficiency of the toaster is 50 %.

Answer What are materials called that don’t allow electrons to move freely from atom to atom? Examples: Wood, Rubber

Back to Jeopardy Back to JeopardyInsulators

Answer What are materials called that allow charges to move freely from atom to atom? Example: Copper

Back to Jeopardy Back to JeopardyConductors

Answer What is one renewable energy source?

Back to Jeopardy Back to Jeopardy Hydroelectricity Hydroelectricity Solar Power Solar Power Wind Wind

Answer What are two large- scale sources of electrical energy?

Back to Jeopardy Back to Jeopardy Fossil Fuel Generating Stations Fossil Fuel Generating Stations Nuclear Generating Stations Nuclear Generating Stations Hydroelectric Generating Stations Hydroelectric Generating Stations

Answer It detects stray or leaking electrical current that could cause a dangerous shock and shuts off power quickly. (It should be installed where water and electricity are near each other.)

Back to Jeopardy Back to Jeopardy Ground Fault Circuit Interrupter (GFCI)