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Home Electrical Engineering Ohm's Law See What Others Are Saying!
  • Question
  • How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor?


  • Options
  • A. 50 V
  • B. 500 V
  • C. 80 V
  • D. 8 V

  • Correct Answer
  • 500 V 


  • More questions

    • 1. A capacitor of 2,000 pF is greater than

    • Options
    • A. 0.02 µF
    • B. 0.002 µF
    • C. 0.0002 µF
    • D. 0.0000002 F
    • Discuss
    • 2. When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is

    • Options
    • A. 12 V
    • B. 120 V
    • C. 240 V
    • D. 2,400 V
    • Discuss
    • 3. Resistance is measured in

    • Options
    • A. henries
    • B. ohms
    • C. hertz
    • D. watts
    • Discuss
    • 4. What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 µWb?

    • Options
    • A. 6,000 µT
    • B. 600 µT
    • C. 600 T
    • D. 6 T
    • Discuss
    • 5. All the voltage drops and the source voltage added together in a series circuit is equal to

    • Options
    • A. the total of the voltage drops
    • B. the source voltage
    • C. zero
    • D. the total of the source voltage and the voltage drops
    • Discuss
    • 6. A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?

    • Options
    • A. 1 MΩ
    • B. 100 kΩ
    • C. 1 kΩ
    • D. 330 Ω
    • Discuss
    • 7. A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will

    • Options
    • A. increase
    • B. remain the same
    • C. decrease
    • D. be less selective
    • Discuss
    • 8. The first row of a certain determinant has the numbers 3 and 5. The second row has the numbers 7 and 2. The value of this determinant is

    • Options
    • A. 31
    • B. ?31
    • C. 39
    • D. ?29
    • Discuss
    • 9. An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:

    • Options
    • A. R = XC
    • B. R > XC
    • C. R < XC
    • D. R = 5XC
    • Discuss
    • 10. The stator is the rotating assembly in a generator or motor.

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


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