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Home ‣ Electronics ‣ Ohm's Law See What Others Are Saying!
  • Question

  • What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?


  • Options
  • A. 43.75
  • B. 70
  • C. 43,750
  • D. 70,000

  • Correct Answer
  • 70 

    Explanation
    (1,750 x 40)/1000 = 70 kilowatt-hour.

    • More questions

    • 1. 

      What is the voltage across the capacitor in the given circuit?


    • Options
    • A. 6.8 V
    • B. 11.9 V
    • C. 16.1 V
    • D. 22.9 V
      • Discuss
    • 2. The diode's characteristic curve shows that current increases when voltage increases.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. It takes 4 µs for the output voltage of an op-amp to rise from ?14 V to +14 V. The slew rate of this op-amp is 3.5 V/µs.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. A JFET has 3 terminals: gate, drain, and source.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. If an open capacitor is checked with an ohmmeter, the needle will:

    • Options
    • A. stay on zero
    • B. stay on infinity
    • C. move from zero to infinity
    • D. move from infinity to zero
      • Discuss
    • 6. The resistive track of a rheostat or potentiometer can be classified as having either a linear or tapered resistance.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. When a circuit consists of a capacitor and a resistor in series with a voltage source, and the voltage across the resistor is zero, then the capacitor is:

    • Options
    • A. charging
    • B. discharging
    • C. fully charged
    • D. fully discharged
      • Discuss
    • 8. The two most common types of analog-to-digital converters discussed in this chapter were the ______.

    • Options
    • A. linear converter and the analog converter
    • B. linear converter and the successive approximation converter
    • C. flash converter and the analog converter
    • D. flash converter and the successive approximation converter
      • Discuss
    • 9. What is the total power in the circuit?


    • Options
    • A. 170 mW
    • B. 1.7 W
    • C. 17 W
    • D. 170 W
      • Discuss
    • 10. 

      If the output voltage were taken across the resistor in the given circuit, the circuit would be a band-stop filter.


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

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