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Parallel Circuits problems

  • 1. Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately

  • Options
  • A. 2.2 A
  • B. 137 mA
  • C. 1.8 A
  • D. 9.09 A
    • Discuss
  • 2. Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance

  • Options
  • A. is less than 6 kΩ
  • B. is greater than 1.2 kΩ
  • C. is less than 1.2 kΩ
  • D. is less than 600 Ω
    • Discuss
  • 3. If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is

  • Options
  • A. 50 mA
  • B. 70 mA
  • C. 120 mA
  • D. 40 mA
    • Discuss
  • 4. In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that

  • Options
  • A. R3 is open
  • B. R1 is open
  • C. R2 is open
  • D. the circuit is operating properly
    • Discuss
  • 5. The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 mA. The value of the current into the junction of these branches is

  • Options
  • A. 200 mA
  • B. 540 mA
  • C. 1.24 A
  • D. 900 mA
    • Discuss
  • 6. Addition of resistors in parallel increases total resistance and decreases total current.

  • Options
  • A. True
  • B. False
    • Discuss
  • 7. The total current divides among parallel resistors in a manner directly proportional to the resistance values.

  • Options
  • A. True
  • B. False
    • Discuss
  • 8. The sum of the currents into a junction is equal to the sum of the currents out of that junction.

  • Options
  • A. True
  • B. False
    • Discuss
  • 9. A parallel circuit acts as a current divider.

  • Options
  • A. True
  • B. False
    • Discuss
  • 10. Parallel resistors are connected between the same two points.

  • Options
  • A. True
  • B. False
    • Discuss

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