2. Who Wants To Be A Millionaire? Electricity and Magnetism

3. Question 1

4. An ammeter is used for measuring A Electrical charge B Circuit temperature C Electrical current D Potential difference

5. Answer A Electrical charge B Circuit temperature C Electrical current D Potential difference

6. £100

7. Question 2

8. Brushes on an electric motor connect to the A commutator B communitarianist C communist D commentator

9. Answer A commutator B communitarianist C communist D commentator

10. £200

11. Question 3

12. Doubling the number of turns on a solenoid will A Increase the magnetic force B Increase the current C Decrease the magnetic force D Increase the voltage

13. Answer A Increase the magnetic force B Increase the current C Decrease the magnetic force D Increase the voltage

14. £300

15. Question 4

16. I kWh of electrical energy costs 5p. What is the cost of running a 10 kW oven for 5 hours? A £5 B £25 C 25p D £2.50

17. Answer A £5 B £25 C 25p D £2.50

18. £500

19. Question 5

20. A copper wire carrying an electrical current A Has no magnetic field around it B Has a magnetic field around it C Only has a north pole D Only has a south pole

21. Answer A Has no magnetic field around it B Has a magnetic field around it C Only has a north pole D Only has a south pole

22. £1,000

23. Question 6

24. Which of the following is the correct rule for electric motors? A Fleming’s right hand rule B The right hand grip C The left hand grip D Fleming’s left-hand rule

25. Answer A Fleming’s right hand rule B The right hand grip C The left hand grip D Fleming’s left-hand rule

26. £2,000

27. Question 7

28. The resistance value of two 10 Ω resistors in parallel is A 0.5 Ω B 20 Ω C 5 Ω D 2 Ω

29. Answer A 0.5 Ω B 20 Ω C 5 Ω D 2 Ω

30. £4,000

31. Question 8

32. The relationship between voltage and current in Ohm’s law is A V = I x R B R= V x I C I = V x R D V = I/R

33. Answer A V = I x R B R= V x I C I = V x R D V = I/R

34. £8,000

35. Question 9

36. Which one is wrong: ‘A current in a wire is induced when’ A a wire is moved between the poles of a magnet B a coil is moved to and fro across a wire C a magnet is moved in and out of a coil D a wire moves faster and faster in a magnetic field

37. Answer A a wire is moved between the poles of a magnet B a magnet is moved in and out of a coil C a coil is moved to and fro across a wire D a wire moves faster and faster in a magnetic field

38. £16,000

39. Question 10

40. The value of the secondary voltage in a transformer is calculated using A V s x V p = N s x N p B V s / N p = N s / V p C V s / V p = N s / N p D V p x I p = V s x I s

41. Answer A V s x V p = N s x N p B V s / N p = N s / V p C V s / V p = N s / N p D V p x I p = V s x I s

42. £32,000

43. Question 11

44. High voltage AC is used to transmit electrical power because A Heat loss is inversely proportional to the current B Transformers heat up more with DC C Heat loss is proportional to the current squared D Low voltage produces more heat

45. Answer A Heat loss is inversely proportional to the current B Transformers heat up with DC C Heat loss is proportional to the current D Low voltage produces more heat

46. £64,000

47. Question 12

48. A device that relies upon eddy currents is A A generator B A metal detector C A loudspeaker D A transformer

49. Answer A A generator B A metal detector C A loudspeaker D A transformer

50. £125,000

51. Question 13

52. This AC generator’s electrical output shows that the rotor was rotated how many times? A Once B Twice C Three times D Four times

53. Answer A Once B Twice C Three times D Four times

54. £250,000

55. Question 14

56. Three-phase output from a power station alternator results from A 3 Stator and rotor coil wire thicknesses used B 3 different speeds of rotation are sequenced C 6 stator coils and 6 rotor coils are set at 60 o in the plane of rotation D 3 stator coils and 3 rotor coils are set at 120 o in the plane of rotation

57. Answer A 3 Stator and rotor coil wire thicknesses are used B 3 different speeds of rotation are sequenced C 6 stator coils and 6 rotor coils are set at 60 o in the plane of rotation D 3 stator coils and 3 rotor coils are set at 120 o in the plane of rotation

58. £500,000

59. Question 15

60. A Temp 1, Light 1 B Temp 0, Light 0 C Temp 0, Light 1 D Temp 1, Light 0 To turn the heater ON the Temp sensor and Light sensor must be Temp sensor Light sensor NOT gate AND gate Heater control

61. Answer A Temp 1, Light 1 B Temp 0, Light 0 C Temp 0, Light 1 D Temp 1, Light 0

62. £1,000,000