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Home ‣ Electronics ‣ Series-Parallel Circuits See What Others Are Saying!
  • 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 

    • More questions

    • 1. In digital electronic circuits, information is first converted to a coded group of pulses.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Displacement, velocity, and acceleration can all be measured by using specific motion transducers.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Another name for "fundamental units" is

    • Options
    • A. base units
    • B. atoms
    • C. the metric system
    • D. letter symbols
      • Discuss
    • 4. If the current drawn in the secondary of a transformer increases, the power in the primary should remain the same.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. If a current of 40 mA flows through a series circuit consisting of a 0.4 µF capacitor and a resistor in series with a 4 kHz, 40 Vac source, what is the total circuit impedance?

    • Options
    • A. 10 Ω
    • B. 100 Ω
    • C. 1 k Ω
    • D. 1 M Ω
      • Discuss
    • 6. A multiplexer is a device that chooses which output to send an input to by means of select lines.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. When the output of a standard TTL gate is HIGH, it can ___________________.

    • Options
    • A. sink 16 mA of current from the attached input gates
    • B. source 400 µA of current to no more than 10 attached gates
    • C. source 16 mA of current to no more than 10 attached gates
    • D. sink a maximum of 400 µA from no more than 10 load gates
      • Discuss
    • 8. What is another name for a one-shot?

    • Options
    • A. monostable
    • B. bistable
    • C. astable
    • D. tristable
      • Discuss
    • 9. 

      What does RT equal in the given circuit?


    • Options
    • A. 90 Ω
    • B. 180 Ω
    • C. 200 Ω
    • D. 1.8 kΩ
      • Discuss
    • 10. Resistance in a series circuit will:

    • Options
    • A. control the voltage
    • B. double the current
    • C. halve the power
    • D. oppose current
      • Discuss

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