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Home Electronics Testing and Troubleshooting See What Others Are Saying!
  • Question
  • The time needed for a pulse to increase from 10% to 90% of its amplitude defines:


  • Options
  • A. pulse width
  • B. propagation delay
  • C. rise time
  • D. duty cycle

  • Correct Answer
  • rise time 


  • More questions

    • 1. The 555 timer can be used in which of the following configurations?

    • Options
    • A. astable, monostable
    • B. monostable, bistable
    • C. astable, toggled
    • D. bistable, tristable
    • Discuss
    • 2. For an S-R flip-flop to be SET or RESET, the respective input must be __________.

    • Options
    • A. LOW
    • B. HIGH
    • C. installed with steering diodes
    • D. in parallel with a limiting resistor
    • Discuss
    • 3. Totem pole outputs _________ be connected __________ because ____________.

    • Options
    • A. can, in parallel, sometimes higher current is required
    • B. cannot, together, if the outputs are in opposite states excessively high currents can damage one or both devices
    • C. should, in series, certain applications may require higher output voltage
    • D. can, together, together they can handle larger load currents and higher output voltages
    • Discuss
    • 4. If the bandwidth of an RC low-pass filter is 20 kHz, the cutoff frequency is also 20 kHz.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. A(n) ________________ is the time it takes a microprocessor to fetch and execute a complete instruction.

    • Options
    • A. instruction cycle
    • B. machine cycle
    • C. timing cycle
    • D. write cycle
    • Discuss
    • 6. The number of bits in a digital word determines the number of digital combinations that will be represented. The number of combinations can be calculated by ________.

    • Options
    • A. raising 2 to the number of bits in the analog word
    • B. raising 2 to the number of bits in the digital word
    • C. multiplying 2 by the number of bits in the analog word
    • D. determining the range of the analog word
    • Discuss
    • 7. The general function of a decoder is to activate one or more circuit outputs upon detection of a particular digital state.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. The magnitude of closed-loop voltage gain (Acl) of an inverting amplifier equals:

    • Options
    • A. the ratio of the input resistance to the feedback resistance
    • B. the open-loop voltage gain Aol
    • C. the feedback resistance divided by the input resistance
    • D. the input resistance
    • Discuss
    • 9. To find the total capacitance of capacitors in parallel, sum the values of the individual capacitors.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. What is the applied voltage for a series RLC circuit when IT = 3 mA, VL = 30 V, VC = 18 V, and R = 1000 ohms?

    • Options
    • A. 3.00 V
    • B. 12.37 V
    • C. 34.98 V
    • D. 48.00 V
    • Discuss


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