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Home ‣ Electronics ‣ Ohm's Law Comments
  • Question

  • Power supplies are regulated to prevent the output voltage from changing due to changes in the


  • Options
  • A. line voltage
  • B. supply load
  • C. frequency
  • D. both line voltage and supply load

  • Correct Answer
  • both line voltage and supply load 

    • Ohm's Law problems

    Search Results

    • 1. If current through a resistance is halved

    • Options
    • A. the resistance is halved
    • B. the voltage is halved
    • C. the voltage doubles
    • D. none of the above
      • Discuss
    • 2. If the voltage across a fixed value of resistance is increased five times, what does the current do?

    • Options
    • A. It increases by a factor of five.
    • B. It decreases by a factor of five.
    • C. It stays the same.
    • D. Not enough information
      • Discuss
    • 3. A battery's capacity to deliver power is measured in

    • Options
    • A. kWh
    • B. Ah
    • C. Wh
    • D. Vh
      • Discuss
    • 4. Energy is defined as the ability to

    • Options
    • A. produce heat
    • B. produce light
    • C. produce sound
    • D. All of the above
      • Discuss
    • 5. "Half-splitting" is

    • Options
    • A. a means for nuclear fuel cells to produce electricity
    • B. a means of isolating a problem in a circuit
    • C. a means for reducing a high ac voltage to a low dc voltage
    • D. a means of limiting current in a circuit
      • Discuss
    • 6. 

      What is the power in the given circuit?


    • Options
    • A. 3.92 kW
    • B. 280 W
    • C. 28.6 W
    • D. 9.8 W
      • Discuss
    • 7. 

      If the voltage in the given circuit was cut in half, what would the current equal?


    • Options
    • A. 10 mA
    • B. 30 mA
    • C. 60 mA
    • D. 90 mA
      • Discuss
    • 8. 

      What is the power in the given circuit?


    • Options
    • A. 3.6 W
    • B. 35 W
    • C. 175 W
    • D. 245 W
      • Discuss
    • 9. A damaged resistor

    • Options
    • A. may appear burned
    • B. may have an increased resistance value
    • C. may be checked with an ohmmeter
    • D. All of the above
      • Discuss
    • 10. Ohm's law is a relationship between

    • Options
    • A. voltage, current, and time
    • B. power, current, and resistance
    • C. resistance, time, and current
    • D. voltage, current, and resistance
      • Discuss

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