Question: When two or more resistors are connected in parallel, how does the the equivalent resistance compare to any individual resistance? What about when connected in

  1. When two or more resistors are connected in parallel, how does the the equivalent resistance compare to any individual resistance? What about when connected in series?
  2. Suppose the energy transferred to a dead battery during charging is W. The recharged battery is then used until fully discharged again. Is the total energy transferred out of the battery during use also W?
  3. Two sets of Christmas lights are available. For set A, when one bulb is removed, the remaining bulbs remain illuminated. For set B, when one bulb is removed, the remaining bulbs do not operate. Explain the difference in wiring for the two sets.
  4. Why is it possible for a bird to sit on a high-voltage wire without being electrocuted? Similarly, if you are skydiving and your parachute gets tangled in power lines, you won't be electrocuted, but be sure to tell no one to touch you!
  5. Why is it dangerous to turn on a light when you are in a bathtub?

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