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  • Question

  • Holding current for an SCR is best described as


  • Options
  • A. the minimum current required for turn-off
  • B. the current required before an SCR will turn on
  • C. the amount of current required to maintain conduction
  • D. the gate current required to maintain conduction

  • Correct Answer
  • the amount of current required to maintain conduction 

    • More questions

    • 1. For a capacitor to completely charge in an RC integrator, the pulse width must be _____ 5 time constants.

    • Options
    • A. less than
    • B. greater than
    • C. equal to
    • D. greater than or equal to
      • Discuss
    • 2. 
      When the current through a coil reverses direction, the magnetic field around the coil _____.

    • Options
    • A. does not change
    • B. disappears
    • C. increases in strength
    • D. reverses direction
      • Discuss
    • 3. A rectangular wave that has a duty cycle of 50% could be called a

    • Options
    • A. "c" wave
    • B. sawtooth wave
    • C. square wave
    • D. triangular wave
      • Discuss
    • 4. Bleeder current is the total current left after the total divider current is subtracted from the total current into the circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The content of a simple programmable logic device (PLD) consists of:

    • Options
    • A. fuse-link arrays
    • B. thousands of basic logic gates
    • C. advanced sequential logic functions
    • D. thousands of basic logic gates and advanced sequential logic functions
      • Discuss
    • 6. The difference between the upper and lower trigger points is called the Schmitt trigger.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. 

      In the given circuit, what must the pulse width and time between pulses be to allow the capacitor to completely charge by the end of each pulse and to completely discharge between each pulse?


    • Options
    • A. 940 µs
    • B. 2.82 ms
    • C. 3.76 ms
    • D. 4.7 ms
      • Discuss
    • 8. If four 10 kΩ resistors are in series with a single 20 kΩ resistor and one of the parallel resistors shorts, the voltage across the other parallel resistors ________.

    • Options
    • A. increases
    • B. decreases
    • C. remains the same
    • D. drops to zero
      • Discuss
    • 9. For inductions in series, LT = L1 + L2 + L3 +...

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. 

      It takes ______ for the output voltage in the given circuit to reach its maximum value.


    • Options
    • A. 0 s
    • B. 243.9 µs
    • C. 1 ms
    • D. 1.22 ms
      • Discuss

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