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  • Question

  • What is the maximum source current for a transformer rated at 10 kVA, 1000/500 60 Hz?


  • Options
  • A. 2 A
  • B. 5 A
  • C. 10 A
  • D. 20 A

  • Correct Answer
  • 20 A 

    • Inductors problems

    Search Results

    • 1. What is the impedance of a 1 kHz series RL circuit when R and XL are both 1000 ohms?

    • Options
    • A. 500 ohms
    • B. 1000 ohms
    • C. 1414 ohms
    • D. 2000 ohms
      • Discuss
    • 2. What is the total inductance assuming no mutual inductance?


    • Options
    • A. 0 mH
    • B. 0.69 mH
    • C. 12 mH
    • D. 24 mH
      • Discuss
    • 3. As current travels within a conductor:

    • Options
    • A. the magnetic field aids the current
    • B. a magnetic field is developed around it
    • C. the wire tries to point north
    • D. an electrostatic field opposes the current
      • Discuss
    • 4. A value of "ten to the eighth power magnetic lines of force" is for the term:

    • Options
    • A. field
    • B. flux
    • C. coulomb
    • D. weber
      • Discuss
    • 5. What type of device consists of a coil with a moveable iron core?

    • Options
    • A. solenoid
    • B. reed switch
    • C. relay
    • D. armature
      • Discuss
    • 6. 

      If the switch is moved to position 1 in the given circuit, how long will it take for the current to reach its maximum value?


    • Options
    • A. 72.5 µs
    • B. 532 µs
    • C. 610 µs
    • D. 833 µs
      • Discuss
    • 7. As a generator armature passes the 270 degree point, the induced voltage is:

    • Options
    • A. at maximum negative
    • B. between maximum negative and zero
    • C. at maximum positive
    • D. between zero and maximum positive
      • Discuss
    • 8. In a B-H curve, magnetizing force is equal to:

    • Options
    • A.
    • B. H = I × N
    • C. ampere-turns per weber
    • D. webers per square meter
      • Discuss
    • 9. When an electromagnet reaches maximum strength, it is considered to be:

    • Options
    • A. in field condition
    • B. at saturation
    • C. inhibited
    • D. at field strength
      • Discuss
    • 10. The four factors determining inductance are the number of turns, coil length, coil area, and:

    • Options
    • A. permeability
    • B. reluctance
    • C. counter emf
    • D. coefficient of coupling
      • Discuss

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