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Home Electrical Engineering Ohm's Law Comments

  • Question
  • How much resistance is required to limit the current from a 12 V battery to 3.6 mA?


  • Options
  • A. 3.3 kΩ
  • B. 33 kΩ
  • C. 2.2 kΩ
  • D. 22 kΩ

  • Correct Answer
  • 3.3 kΩ 


  • Ohm's Law problems


    Search Results


    • 1. 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
    • 2. 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
    • Discuss
    • 3. Approximately how much current flows through a 3.3 MΩ resistor across a 30 V source?

    • Options
    • A. 9 µA
    • B. 90 µA
    • C. 900 µA
    • D. 9000 µA
    • Discuss
    • 4. 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
    • Discuss
    • 5. The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately

    • Options
    • A. 112 Ω
    • B. 11.2 Ω
    • C. 1.2 Ω
    • D. 18 Ω
    • Discuss
    • 6. How much resistance is needed to draw 17.6 mA from a 12 volt source?

    • Options
    • A. 212 Ω
    • B. 6.8 kΩ
    • C. 68 Ω
    • D. 680 Ω
    • Discuss
    • 7. Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?

    • Options
    • A. 4 Ω
    • B. 400 Ω
    • C. 4 kΩ
    • D. 4.4 Ω
    • Discuss
    • 8. You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?

    • Options
    • A. 9 V
    • B. 900 mV
    • C. 0 V
    • D. 18 V
    • Discuss
    • 9. What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?

    • Options
    • A. 183 Ω
    • B. 18.3 Ω
    • C. 66 Ω
    • D. 6.6 Ω
    • Discuss
    • 10. How much current is produced by a voltage of 18 kV across a 15 kΩ resistance?

    • Options
    • A. 1.2 A
    • B. 12 A
    • C. 120 mA
    • D. 12 mA
    • Discuss


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