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  • Question
  • A 33 Ω half-watt resistor and a 330 Ω half-watt resistor are connected across a 12 V source. Which one(s) will overheat?


  • Options
  • A. 33 Ω
  • B. 330 Ω
  • C. both resistors
  • D. neither resistor

  • Correct Answer
  • neither resistor 


  • Energy and Power problems


    Search Results


    • 1. If it takes 400 ms to use 12,000 J of energy, the power is

    • Options
    • A. 30 kW
    • B. 30 W
    • C. 3 W
    • D. 300 kW
    • Discuss
    • 2. When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

    • Options
    • A. overheated
    • B. shorted
    • C. open
    • D. reversed
    • Discuss
    • 3. For 12 V and 40 mA, the power is

    • Options
    • A. 480 mW
    • B. 0.480 W
    • C. 480,000 µW
    • D. all of the above
    • Discuss
    • 4. Three hundred joules of energy are consumed in 15 s. The power is

    • Options
    • A. 2,000 W
    • B. 2 W
    • C. 20 W
    • D. 200 W
    • Discuss
    • 5. At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

    • Options
    • A. 1.286 kWh
    • B. 12.85 kWh
    • C. 535 kWh
    • D. 252 kWh
    • Discuss
    • 6. The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be

    • Options
    • A. 2 W
    • B. 1 W
    • C. 5 W
    • D. 0.5 W
    • Discuss
    • 7. When the current through a 12 kΩ resistor is 8 mA, the power is

    • Options
    • A. 7.68 mW
    • B. 768 mW
    • C. 7.68 W
    • D. 76.8 W
    • Discuss
    • 8. In 40 kW, there are

    • Options
    • A. 0.4 mW
    • B. 40,000 W
    • C. 400 W
    • D. 5,000 W
    • Discuss
    • 9. A half-watt is equal to how many milliwatts?

    • Options
    • A. 5,000 mW
    • B. 5 mW
    • C. 500 mW
    • D. 50 mW
    • Discuss
    • 10. A 6 V battery is connected to a 300 Ω load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

    • Options
    • A. 1 h
    • B. 200 h
    • C. 2,000 h
    • D. 10 h
    • Discuss


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