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  • Question

  • If a series?parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3?


  • Options
  • A. 10 ohms
  • B. 20 ohms
  • C. 45 ohms
  • D. 90 ohms

  • Correct Answer
  • 45 ohms 

    • Series-Parallel Circuits problems

    Search Results

    • 1. 

      If the load in the given circuit is open, what is the unloaded output voltage?


    • Options
    • A. 0 V
    • B. 4 V
    • C. 16 V
    • D. 20 V
      • Discuss
    • 2. What is the voltage to the load?


    • Options
    • A. 11.4 V
    • B. 12.4 V
    • C. 13.4 V
    • D. 15.4 V
      • Discuss
    • 3. The first goal(s) to accomplish in analyzing a complex series?parallel circuit is to:

    • Options
    • A. equate all parallel components
    • B. equate all series components
    • C. solve for all the voltage drops
    • D. solve for the total current and resistance
      • Discuss
    • 4. If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?

    • Options
    • A. increases
    • B. decreases
    • C. remains the same
    • D. cannot tell
      • Discuss
    • 5. 

      If the load in the given circuit is 12 kΩ , what is the loaded output voltage?


    • Options
    • A. 5.88 V
    • B. 14.12 V
    • C. 16 V
    • D. 17.14 V
      • Discuss
    • 6. What is the total resistance of a circuit when R1 (7 k Ω) is in series with a parallel combination of R2 (20 k Ω), R3 (36 k Ω), and R4 (45 k Ω)?

    • Options
    • A. 4 k Ω
    • B. 17 k Ω
    • C. 41 k Ω
    • D. 108 k Ω
      • Discuss
    • 7. If a Wheatstone bridge is balanced, a voltmeter in the center of the bridge will read:

    • Options
    • A. the same as the source voltage
    • B. half the source voltage
    • C. zero volts
    • D. twice the source voltage
      • Discuss
    • 8. Fixed transformers have:

    • Options
    • A. a center-tapped secondary
    • B. multiple windings
    • C. turns ratios that cannot be changed
    • D. a multiple-tapped secondary
      • Discuss
    • 9. Electricity may be generated by a wire:

    • Options
    • A. carrying current
    • B. wrapped as a coil
    • C. that has neutral domains
    • D. passing through a flux field
      • Discuss
    • 10. What is the permeability of machine steel?

    • Options
    • A. 1.1 x 10?4
    • B. 5.65 x 10?4
    • C. 6.9 x 10?3
    • D. 8.8 x 10?3
      • Discuss

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