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Home Electrical Engineering RLC Circuits and Resonance See What Others Are Saying!
  • Question
  • A 90 Ω resistor, a coil with 30 Ω of reactance, and a capacitor with 50 Ω of reactance are in series across a 12 V ac source. The current through the resistor is


  • Options
  • A. 9 mA
  • B. 90 mA
  • C. 13 mA
  • D. 130 mA

  • Correct Answer
  • 130 mA 


  • More questions

    • 1. What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?

    • Options
    • A. 9.7 Ω
    • B. 97 Ω
    • C. 23 Ω
    • D. 230 Ω
    • Discuss
    • 2. An 18 V source has an internal resistance of 70 Ω. If a load resistance of 33 Ω is connected to the voltage source, the load power, PL, is

    • Options
    • A. 0 W
    • B. 1 W
    • C. 175 mW
    • D. 18 mW
    • Discuss
    • 3. In a series resonant band-pass filter, a lower value of Q results in

    • Options
    • A. a higher resonant frequency
    • B. a smaller bandwidth
    • C. a higher impedance
    • D. a larger bandwidth
    • Discuss
    • 4. At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

    • Options
    • A. 1.286 kWh
    • B. 12.85 kWh
    • C. 535 kWh
    • D. 252 kWh
    • Discuss
    • 5. When the north poles of two bar magnets are brought close together, there will be

    • Options
    • A. no force
    • B. a downward force
    • C. a force of attraction
    • D. a force of repulsion
    • Discuss
    • 6. When assigning branch currents, you need not be concerned with the direction you choose.

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is

    • Options
    • A. 1 mA
    • B. 10 mA
    • C. 100 mA
    • D. 1 A
    • Discuss
    • 8. An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is

    • Options
    • A. 6 V
    • B. 3 V
    • C. 2 V
    • D. 0 V
    • Discuss
    • 9. When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle

    • Options
    • A. increases
    • B. decreases
    • C. is not affected
    • D. cannot be determined
    • Discuss
    • 10. A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is

    • Options
    • A. 2.43 µF
    • B. 4.86 µF
    • C. 100 µF
    • D. 152 µF
    • Discuss


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