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Jeopardy

Electricity. Jeopardy. Electricity Jeopardy. The Law of Electric Charges states that like charges _______one another, unlike charges _______ one another, and charged objects ________ neutral objects. 100. Answer. Repel Attract Sometimes Attract. Back to Jeopardy.

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Jeopardy

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  1. Electricity Jeopardy

  2. Electricity Jeopardy

  3. The Law of Electric Charges states that like charges _______one another, unlike charges _______ one another, and charged objects ________ neutral objects. 100 Answer

  4. Repel Attract Sometimes Attract Back to Jeopardy

  5. What type of overall charge does each of the pith balls below have? Would the pith balls below attract, repel or have no effect? 1. 2. + - - - + - + ++ 200 Answer

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

  7. Charging by _______ is when two objects are rubbed together and one object loses electrons, the other gains electrons. 300 Answer

  8. Friction Back to Jeopardy

  9. Show the movement of electrons when the pith ball is charged by contact. + - - - + - + - + - Charged Pith Ball Neutral Pith ball and negative strip 400 Answer

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

  11. Show the movement of electrons in the pith ball in induced charge separation. + - + - + - Pith ball and positive acetate strip Pith ball with strip removed Neutral 500 Answer

  12. - + + + Neutral - + - + +- + - +- +- Pith ball and strip attract Back to Jeopardy

  13. What controls the flow of electrons in an electric circuit? Answer 100

  14. A switch Back to Jeopardy

  15. What type of circuit has all of it’s parts wired to each other along one path where electrons must go through each load. Answer 200

  16. A series circuit Back to Jeopardy

  17. 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. Answer 300

  18. Divided Equal Back to Jeopardy

  19. Draw a schematic diagram of 2 cells in series, 1 closed switch, 1 ammeter and 2 lights in series. 400 Answer

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

  21. 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. 500 Answer

  22. See chalk board for answer! Back to Jeopardy

  23. Electric current is the ________ at which electrons ________ through a circuit. 100 Answer

  24. Number Pass Back to Jeopardy

  25. Voltage is the amount of _______ _____ an electron gains or loses between two points in a circuit. 200 Answer

  26. Electrical Energy Back to Jeopardy

  27. The ability to slow down the flow of electrons in conductors. 300 Answer

  28. Resistance Back to Jeopardy

  29. What is the voltage of an ipod, that has a resistance of 5Ω when the current running through it is 2A? 400 Answer

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

  31. What is the resistance of a PS3, if a current of 10A runs through it, when it is connected to a wall outlet (120V)? 500 Answer

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

  33. What is the equation for electrical energy? 100 Answer

  34. E = V x I x ∆t Back to Jeopardy

  35. 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? 200 Answer

  36. Given: V= 18 V I = 2A t = 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. Back to Jeopardy

  37. 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? 300 Answer

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

  39. 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? 400 Answer

  40. Given: E= 5kWh Rate = $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. Back to Jeopardy

  41. What is the percent efficiency of a toaster if the useful energy output is 10000J and the total energy input is 20000J? 500 Answer

  42. Given: Useful energy output = 10000 J Total energy input = 20000 J Unknown: Percent Efficiency =? % efficiency = Useful energy output x 100% Total energy input % efficiency = 10000 J x 100 % 20000 J % efficiency = 50 % Therefore the % efficiency of the toaster is 50 %. Back to Jeopardy

  43. What are materials called that don’t allow electrons to move freely from atom to atom? Examples: Wood, Rubber 100 Answer

  44. Insulators Back to Jeopardy

  45. What are materials called that allow charges to move freely from atom to atom? Example: Copper 200 Answer

  46. Conductors Back to Jeopardy

  47. What is one renewable energy source? 300 Answer

  48. Hydroelectricity • Solar Power • Wind Back to Jeopardy

  49. What are two large-scale sources of electrical energy? 400 Answer

  50. Fossil Fuel Generating Stations • Nuclear Generating Stations • Hydroelectric Generating Stations Back to Jeopardy

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