1305 Chapter 13 Reading Guide and Problems: SECTION 3 (10pts)
  • Write all answers in your bound journal
  • Make it NEAT and in COMPLETE SENTENCES, clearly identify which section you are working (using numbers)
  • Box final answers if doing math.
  • -4pt if you do not title and date the entry
  • -1pt (per infraction) if you do not clearly identify the sections, or number the problems
    Definitions
  1. The _____ is the unit for measuring resistance.
  2. _____ explains the relationship between current, voltage, and resistance in a circuit.
  3. _____ is the measure of how strongly a material resists current.
  4. A _____ has a resistance that can be changed.
  5. Wires in a circuit are made of a material that is a _____, such as copper.
     
    Questions
  6. The greater the resistance in a circuit, the less the _____
  7. A circuit contains one light bulb and a battery. What happens to the total resistance in the circuit if you replace the one light bulb with a string of four identical bulbs? Why?
  8. What is the unit for resistance? What symbol is used to represent this unit?
  9. What does is mean to say that current and resistance in a circuit are inversely related?
  10. What does it mean to say that current and voltage in a circuit are directly related?
  11. According to Ohm’s law, the current in a circuit increases if the _____ increases. The current decreases if the _____ increases.
  12. A battery is connected to a light bulb, creating a simple circuit. Explain what will happen to the current in the circuit if
    a. the bulb is replaced with a bulb having a higher resistance.
    b. the bulb is replaced with a bulb having a lower resistance.
    c. the battery is replaced with a battery having a greater voltage.
  13. Why does a light bulb’s resistance increase if it is left on for a period of time?
  14. Why can you safely handle a 1.5-V battery without being electrocuted?
  15. What is the difference between a conductor and an insulator?
  16. Why is it important to always have dry hands when working with electric circuits?
  17. Explain why electrical wires are made of copper covered in a layer of plastic.
  18. What is a semiconductor?
  19. Classify each of the following as a conductor, semiconductor, or insulator.
    a. copper
    b. plastic
    c. rubber
    d. silicon
    e. iron
    f. glass