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

  • How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor?


  • Options
  • A. 50 V
  • B. 500 V
  • C. 80 V
  • D. 8 V

  • Correct Answer
  • 500 V 

    • More questions

    • 1. If a 6 V and a 9 V source are connected series aiding, the total voltage is

    • Options
    • A. 6 V
    • B. 9 V
    • C. 3 V
    • D. 15 V
      • Discuss
    • 2. Total current in an RC circuit always leads the source voltage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. In 40 kW, there are

    • Options
    • A. 0.4 mW
    • B. 40,000 W
    • C. 400 W
    • D. 5,000 W
      • Discuss
    • 4. Energy is stored by a capacitor in a magnetic field.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. A filter passes all frequencies.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A series circuit acts as a current divider.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A transformer responds only to dc.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. A half-watt is equal to how many milliwatts?

    • Options
    • A. 5,000 mW
    • B. 5 mW
    • C. 500 mW
    • D. 50 mW
      • Discuss
    • 9. To step 120 V ac up to 900 V ac, the turns ratio must be

    • Options
    • A. 75
    • B. 750
    • C. 7.5
    • D. 0.13
      • Discuss
    • 10. A transformer consists of two or more cores that are electrically coupled on a common core.

    • Options
    • A. True
    • B. False
      • Discuss

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