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  • Question

  • 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

  • Correct Answer
  • 1.24 A 

    • More questions

    • 1. A 6 V battery output is divided down to obtain two output voltages. Three 2.2 kΩ resistors are used to provide the two taps. The two output voltages are

    • Options
    • A. 2 V, 4 V
    • B. 2 V, 2 V
    • C. 2 V, 6 V
    • D. 4 V, 6 V
      • Discuss
    • 2. What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 µWb/At × m?

    • Options
    • A. 1111 At/Wb
    • B. 111 At/Wb
    • C. 11 At/Wb
    • D. 1 At/Wb
      • Discuss
    • 3. A 0.00022 F capacitor equals how many microfarads?

    • Options
    • A. 22 µF
    • B. 220 µF
    • C. 2,200 µF
    • D. 22,200 µF
      • Discuss
    • 4. If the value of C in a series RLC circuit is decreased, the resonant frequency

    • Options
    • A. is not affected
    • B. increases
    • C. is reduced to zero
    • D. decreases
      • Discuss
    • 5. Find the total current through R3 in the given circuit.


    • Options
    • A. 7.3 mA
    • B. 5.5 mA
    • C. 12.8 mA
    • D. 1.8 mA
      • Discuss
    • 6. When the current through the coil of an electromagnet reverses, the

    • Options
    • A. direction of the magnetic field reverses
    • B. direction of the magnetic field remains unchanged
    • C. magnetic field expands
    • D. magnetic field collapses
      • Discuss
    • 7. When the current is 2.5 A, how many coulombs pass a point in 0.2 s?

    • Options
    • A. 12.5 C
    • B. 1.25 C
    • C. 0.5 C
    • D. 5 C
      • Discuss
    • 8. Two inductors, L1 and L2, are in parallel. L1 has a value of 25 µH and L2 a value of 50 µH. The parallel combination is in series with L3, a 20 µH coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is

    • Options
    • A. 87 mA
    • B. 870 mA
    • C. 87 A
    • D. 337 mA
      • Discuss
    • 9. The number 4.38 × 10?3 expressed as a number having a power of 10?6 is

    • Options
    • A. 4,380 × 10?6
    • B. 438 × 10?6
    • C. 43,800 × 10?6
    • D. 438,000 × 10?6
      • Discuss
    • 10. 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
      • Discuss

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