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Home ‣ Electronics ‣ Ohm's Law Comments
  • Question

  • The rate at which work is performed is called


  • Options
  • A. current
  • B. energy
  • C. power
  • D. voltage

  • Correct Answer
  • power 

    • Ohm's Law problems

    Search Results

    • 1. If doubling the voltage across a resistor doubles the current through the resistor then

    • Options
    • A. the resistor value decreased
    • B. the resistor value did not change
    • C. the resistor value increased
    • D. it is impossible to determine the change in the resistor value
      • Discuss
    • 2. Ohm's law describes the mathematical relationship between

    • Options
    • A. ohms, kilohms, and megohms
    • B. resistor size and resistor value
    • C. resistance, voltage, and current
    • D. none of the above
      • Discuss
    • 3. 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
    • 4. 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
    • 5. 

      What is the power in the given circuit?


    • Options
    • A. 3.6 W
    • B. 35 W
    • C. 175 W
    • D. 245 W
      • Discuss
    • 6. Power supplies differ from batteries in that

    • Options
    • A. power supply output voltages are ac and not dc
    • B. power supply voltages are not stable
    • C. power supplies are low-current devices
    • D. None of the above
      • Discuss
    • 7. If voltage across a resistance doubles

    • Options
    • A. the current is halved
    • B. the resistance doubles
    • C. the current is unchanged
    • D. none of the above
      • Discuss
    • 8. 

      What is the peak voltage across R3 in the given circuit?


    • Options
    • A. 1.2 V
    • B. 5 V
    • C. 7 V
    • D. 12 V
      • Discuss
    • 9. A rectangular wave that has a duty cycle of 50% could be called a

    • Options
    • A. "c" wave
    • B. sawtooth wave
    • C. square wave
    • D. triangular wave
      • Discuss
    • 10. A single-phase induction motor

    • Options
    • A. is self-starting
    • B. operates at a fixed speed
    • C. is less reliable than a three-phase synchronous motor
    • D. none of the above
      • Discuss

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