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Home ‣ Electrical Engineering ‣ Ohm's Law See What Others Are Saying!
  • Question

  • When 12 V are applied across a 68 Ω resistor, the current is


  • Options
  • A. 816 mA
  • B. 17.6 mA
  • C. 176 mA
  • D. 8.16 mA

  • Correct Answer
  • 176 mA 

    • More questions

    • 1. A thermistor is a type of

    • Options
    • A. switch
    • B. resistor
    • C. battery
    • D. power supply
      • Discuss
    • 2. A band-pass filter rejects all frequencies within a band between a lower and an upper critical frequency and passes all others.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The resistor voltage in an RL circuit is always out of phase with the current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The following coils are in parallel: 75 µH, 40 µH, 25 µH, and 15 µH. The total inductance is approximately

    • Options
    • A. 6.9 µH
    • B. 14 µH
    • C. 2.2 µH
    • D. 155 µH
      • Discuss
    • 5. Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?

    • Options
    • A. 27.2 mA
    • B. 59 mA
    • C. 5.9 mA
    • D. 590 mA
      • Discuss
    • 6. A resistor of 3 kΩ, a 0.05 µF capacitor, and a 120 mH coil are in series across a 5 kHz, 20 V ac source. What is the impedance, expressed in polar form?

    • Options
    • A. 636 Ω
    • B. 3,769 Ω
    • C. 433 Ω
    • D. 4,337 Ω
      • Discuss
    • 7. In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is

    • Options
    • A. one-fourth the primary current
    • B. four times the primary current
    • C. equal to the primary current
    • D. one-fourth the primary current and equal to the primary current
      • Discuss
    • 8. To produce an 800 Hz sine wave, a four-pole generator must be operated at

    • Options
    • A. 200 rps
    • B. 400 rps
    • C. 800 rps
    • D. 1,600 rps
      • Discuss
    • 9. When a fourth resistor is connected in series with three resistors, the total resistance

    • Options
    • A. increases by one-fourth
    • B. increases
    • C. decreases
    • D. remains the same
      • Discuss
    • 10. A 68 Ω resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is

    • Options
    • A. 132 mW
    • B. 13.2 mW
    • C. 22.6 mW
    • D. 226 mW
      • Discuss

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