Chapter 19: DC Circuits

78 Questions | Total Attempts: 222

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Chapter 19: DC Circuits - Quiz

Questions and Answers
  • 1. 
    The potential difference between the terminals of a battery, when no current flows to an external circuit, is referred to as the
    • A. 

      Emf.

    • B. 

      Terminal voltage.

  • 2. 
    The potential difference between the terminals of a battery, when current flows to an external circuit, is referred to as the
    • A. 

      Emf.

    • B. 

      Terminal voltage.

  • 3. 
    When two or more resistors are connected in series to a battery
    • A. 

      The total voltage across the combination is the algebraic sum of the voltages across the individual resistors.

    • B. 

      The same current flows through each resistor.

    • C. 

      The equivalent resistance of the combination is equal to the sum of the resistances of each resistor.

    • D. 

      All of the given answers

  • 4. 
    When resistors are connected in series,
    • A. 

      The same power is dissipated in each one.

    • B. 

      The potential difference across each is the same.

    • C. 

      The current flowing in each is the same.

    • D. 

      More than one of the given answers is true.

  • 5. 
    Three identical resistors are connected in series to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the resistors?
    • A. 

      12 A

    • B. 

      4 A

    • C. 

      36 A

    • D. 

      Zero

  • 6. 
    Three identical resistors are connected in series to a 12-V battery. What is the voltage across any one of the resistors?
    • A. 

      36 V

    • B. 

      12 V

    • C. 

      4 V

    • D. 

      Zero

  • 7. 
    You obtain a 100-W light bulb and a 50-W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct?
    • A. 

      Both bulbs glow at the same reduced brightness.

    • B. 

      Both bulbs glow at the same increased brightness.

    • C. 

      The 100-W bulb glows brighter than the 50-W bulb.

    • D. 

      The 50-W bulb glows more brightly than the 100-W bulb.

  • 8. 
    As more resistors are added in series to a constant voltage source, the power supplied by the source
    • A. 

      Increases.

    • B. 

      Decreases.

    • C. 

      Does not change.

    • D. 

      Increases for a time and then starts to decrease.

  • 9. 
    When two or more resistors are connected in parallel to a battery,
    • A. 

      The voltage across each resistor is the same.

    • B. 

      The total current flowing from the battery equals the sum of the currents flowing through each resistor.

    • C. 

      The equivalent resistance of the combination is less than the resistance of any one of the resistors.

    • D. 

      All of the given answers

  • 10. 
    When resistors are connected in parallel, we can be certain that
    • A. 

      The same current flows in each one.

    • B. 

      The potential difference across each is the same.

    • C. 

      The power dissipated in each is the same.

    • D. 

      Their equivalent resistance is greater than the resistance of any one of the individual resistances.

  • 11. 
    Three identical resistors are connected in parallel to a 12-V battery. What is the voltage of any one of the resistors?
    • A. 

      36 V

    • B. 

      12 V

    • C. 

      4 V

    • D. 

      Zero

  • 12. 
    Three identical resistors are connected in parallel to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the resistors?
    • A. 

      12 A

    • B. 

      4 A

    • C. 

      36 A

    • D. 

      Zero

  • 13. 
    The lamps in a string of Christmas tree lights are connected in parallel. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to the lamps.)
    • A. 

      The brightness of the lamps will not change appreciably.

    • B. 

      The other lamps get brighter equally.

    • C. 

      The other lamps get brighter, but some get brighter than others.

    • D. 

      The other lamps get dimmer equally.

    • E. 

      The other lamps get dimmer, but some get dimmer than others.

  • 14. 
    As more resistors are added in parallel to a constant voltage source, the power supplied by the source
    • A. 

      Increases.

    • B. 

      Decreases.

    • C. 

      Does not change.

    • D. 

      Increases for a time and then starts to decrease.

  • 15. 
    Consider three identical resistors, each of resistance R. The maximum power each can dissipate is P. Two of the resistors are connected in series, and a third is connected in parallel with these two. What is the maximum power this network can dissipate?
    • A. 

      2P/3

    • B. 

      3P/2

    • C. 

      2P

    • D. 

      3P

  • 16. 
    Kirchhoff's loop rule is an example of
    • A. 

      Conservation of energy.

    • B. 

      Conservation of charge.

    • C. 

      Conservation of momentum.

    • D. 

      None of the given answers

  • 17. 
    Kirchhoff's junction rule is an example of
    • A. 

      Conservation of energy.

    • B. 

      Conservation of charge.

    • C. 

      Conservation of momentum.

    • D. 

      None of the given answers

  • 18. 
    If you connect two identical storage batteries together in series ("+" to "-" to "+" to "-"), and place them in a circuit, the combination will provide
    • A. 

      Zero volts.

    • B. 

      Twice the voltage, and different currents will flow through each.

    • C. 

      Twice the voltage, and the same current will flow through each.

    • D. 

      The same voltage, and different currents will flow through each.

  • 19. 
    If you connect two identical storage batteries together in series ("+" to "-" to "-" to "+"), and place them in a circuit, the combination will provide
    • A. 

      Zero volts.

    • B. 

      Twice the voltage, and different currents will flow through each.

    • C. 

      Twice the voltage, and the same current will flow through each.

    • D. 

      The same voltage, and different currents will flow through each.

  • 20. 
    If you connect two identical storage batteries together in parallel, and place them in a circuit, the combination will provide
    • A. 

      Twice the voltage and twice the total charge that one battery would.

    • B. 

      Twice the voltage and the same total charge that one battery would.

    • C. 

      The same voltage and twice the total charge that one battery would.

    • D. 

      D) half the voltage and half the total charge that one battery would.

  • 21. 
    When two or more capacitors are connected in series to a battery
    • A. 

      The total voltage across the combination is the algebraic sum of the voltages across the individual capacitors.

    • B. 

      Each capacitor carries the same amount of charge.

    • C. 

      The equivalent capacitance of the combination is less than the capacitance of any of the capacitors.

    • D. 

      All of the given answers

  • 22. 
    As more and more capacitors are connected in series, the equivalent capacitance of the combination increases.
    • A. 

      Always true

    • B. 

      Sometimes true; it depends on the voltage of the battery to which the combination is connected.

    • C. 

      Sometimes true; it goes up only if the next capacitor is larger than the average of the existing combination.

    • D. 

      Never true

  • 23. 
    Three identical capacitors are connected in series to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry?
    • A. 

      3Q

    • B. 

      Q

    • C. 

      Q/3

    • D. 

      Q/9

  • 24. 
    When two or more capacitors are connected in parallel to a battery,
    • A. 

      The voltage across each capacitor is the same.

    • B. 

      Each capacitor carries the same amount of charge.

    • C. 

      The equivalent capacitance of the combination is less than the capacitance of any one of the capacitors.

    • D. 

      All of the given answers

  • 25. 
    As more and more capacitors are connected in parallel, the equivalent capacitance of the combination increases.
    • A. 

      Always true

    • B. 

      Sometimes true; it depends on the voltage of the battery to which the combination is connected.

    • C. 

      Sometimes true; it goes up only if the next capacitor is larger than the average of the existing combination.

    • D. 

      Never true

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