52. What happens to the brightness of light emitted by a lightbulb when the current flowing through it increases?

54. What happens to the brightness of light emitted by a lightbulb when the current flowing through it increases?

56. Your friend says that a battery supplies the electrons in an electric circuit. Do you agree or disagree? Defend your answer

58. Is a current-carrying wire electrically charged because of the electrons moving in it?

59. Your tutor tells you that an ampere and a volt really measure the same thing and that the different terms only serve to make a simple concept seem confusing. Why should you consider getting a different tutor?

63. Something gets "used up" in a battery that eventually dies and goes flat. One friend says that current is used up. Another friend says that energy is used up. Who, if either, do you agree with, and why?

69. Would you expect to find dc or ac in the filament of a lightbulb in your home? In the headlamp of an automobile?

70. Are automobile headlamps wired in parallel or in series? What is your evidence?

73. Between current and voltage, which is the same for a 10- and a 20- resistor in series in a series circuit?

74. Between current and voltage, which is the same for a 10- and a 20- resistor in parallel in a parallel circuit?