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Home ‣ Electrical Engineering ‣ Parallel Circuits See What Others Are Saying!
  • Question

  • 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

  • Correct Answer
  • 490 mA 

    • More questions

    • 1. In an RC low-pass filter, the output voltage is taken across the resistor and the output lags the input voltage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A reflective load is a load as it appears to the source in the primary of a transformer.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A transformer changes ac to dc.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Series aiding is a term sometimes used to describe voltage sources of the same polarity in series.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The number 4,500,000 can be expressed as

    • Options
    • A. 4,500 × 106
    • B. 4.5 × 106
    • C. 4.5 × 10-3
    • D. either 4,500 × 104 or 4.5 × 106
      • Discuss
    • 6. Two 1.5 V cells are connected series opposing across two 100 Ω resistors in series. Total current flow is

    • Options
    • A. 15 mA
    • B. 5 mA
    • C. 2 mA
    • D. 0 A
      • Discuss
    • 7. The branch current method uses

    • Options
    • A. Kirchhoff's voltage and current laws
    • B. Thevenin's theorem and Ohm's law
    • C. Kirchhoff's current law and Ohm's law
    • D. the superposition theorem and Thevenin's theorem
      • Discuss
    • 8. Some circuits require more than one voltage or current source.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. An ohmmeter is an instrument for measuring

    • Options
    • A. current
    • B. voltage
    • C. resistance
    • D. wattage
      • Discuss
    • 10. In a three-phase system, the voltages are separated by

    • Options
    • A. 45°
    • B. 90°
    • C. 120°
    • D. 180°
      • Discuss

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