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  • Question

  • A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 kΩ. The current through each bulb is approximately


  • Options
  • A. 610 mA
  • B. 18 mA
  • C. 110 mA
  • D. 61 mA

  • Correct Answer
  • 61 mA 

    • Parallel Circuits problems

    Search Results

    • 1. The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω resistor that makes up part of the parallel circuit is approximately

    • Options
    • A. 22 mA
    • B. 120 mA
    • C. 220 mA
    • D. 50 mA
      • Discuss
    • 2. The following resistors are in parallel across a voltage source: 220 Ω, 470 Ω, and 560 Ω. The resistor with the least current is

    • Options
    • A. 220 Ω
    • B. 470 Ω
    • C. 560 Ω
    • D. impossible to determine without knowing the voltage
      • Discuss
    • 3. An ammeter has an internal resistance of 50 Ω. The meter movement itself can handle up to 1 mA. If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately

    • Options
    • A. 55 Ω
    • B. 5.5 Ω
    • C. 50 Ω
    • D. 9 Ω
      • Discuss
    • 4. Three 47 Ω resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately

    • Options
    • A. 2.3 A
    • B. 780 mA
    • C. 47 mA
    • D. 7.06 A
      • Discuss
    • 5. When an additional resistor is connected across an existing parallel circuit, the total resistance

    • Options
    • A. remains the same
    • B. decreases by the value of the added resistor
    • C. increases by the value of the added resistor
    • D. decreases
      • Discuss
    • 6. Four 8 Ω speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers

    • Options
    • A. 18 W
    • B. 1.5 W
    • C. 48 W
    • D. 72 W
      • Discuss
    • 7. Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 Ω, the current through each parallel resistor is

    • Options
    • A. 25 mA
    • B. 100 mA
    • C. 6.25 mA
    • D. 200 mA
      • Discuss
    • 8. A sudden increase in the total current into a parallel circuit may indicate

    • Options
    • A. a drop in source voltage
    • B. an open resistor
    • C. an increase in source voltage
    • D. either a drop in source voltage or an open resistor
      • Discuss
    • 9. Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is

    • Options
    • A. 60 mA
    • B. 15 mA
    • C. 135 mA
    • D. 31.25 mA
      • Discuss
    • 10. There is a total of 800 mA of current into four parallel resistors. The currents through three of the resistors are 40 mA, 70 mA, and 200 mA. The current through the fourth resistor is

    • Options
    • A. 490 mA
    • B. 800 mA
    • C. 310 mA
    • D. 0 A
      • Discuss

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