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Home Electronics Ohm's Law Comments

  • Question
  • The power is ___ if 200 J of energy are used in 10 s.


  • Options
  • A. 2 W
  • B. 5 W
  • C. 20 W
  • D. 50 W

  • Correct Answer
  • 20 W 


  • Ohm's Law problems


    Search Results


    • 1. The number of joules used in 1 second is always equal to the number of _______.

    • Options
    • A. siemens
    • B. coulombs
    • C. amperes
    • D. watts
    • Discuss
    • 2. Resistance and current are _________.

    • Options
    • A. directly proportional
    • B. inversely proportional
    • C. not related
    • D. similar to voltage
    • Discuss
    • 3. 

      The power rating for the resistor in the given circuit should be at least ______.


    • Options
    • A. 1/4 W
    • B. 1/2 W
    • C. 1 W
    • D. 2 W


    • Discuss
    • 4. 

      The power rating for the resistor in the given circuit should be at least ___.


    • Options
    • A. 1/4 W
    • B. 1/2 W
    • C. 1 W
    • D. 2 W
    • Discuss
    • 5. If the voltage across a resistor ___, the current flowing through it will increase.

    • Options
    • A. increases
    • B. decreases
    • C. stays the same
    • D. Not enough information
    • Discuss
    • 6. 

      The voltage supplying the current in the given circuit is _____.


    • Options
    • A. 2.5 V
    • B. 25 V
    • C. 250 V
    • D. 2.5 kV
    • Discuss
    • 7. The voltage across a 2.2 kΩ resistor is ___ if 3 mA of current is flowing through it.

    • Options
    • A. 6.6 V
    • B. 7.33 V
    • C. 1.4 V
    • D. 0.8 V
    • Discuss
    • 8. The current is ___ if the voltage across a 5 kΩ resistor is 25 V.

    • Options
    • A. 200 mA
    • B. 125 mA
    • C. 75 mA
    • D. 5 mA
    • Discuss
    • 9. The phase angle will decrease in a series RL circuit if the inductance is increased.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. As frequency decreases in a parallel RL circuit the impedance also decreases.

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


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