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SQA Advanced Higher Engineering Science Electronics and control overview quiz quiz

17questions. Pick an answer and you'll see why right away.

  1. What is the closed-loop gain of an inverting amplifier with input resistor R1 and feedback resistor Rf?

  2. Why is the inverting input of an op-amp with negative feedback called a virtual earth?

  3. What limits the maximum output voltage of an op-amp?

  4. What does the time constant of an RC circuit equal?

  5. Approximately what fraction of the final voltage does a charging capacitor reach after one time constant?

  6. An RC circuit has its output taken across the resistor. What type of filter is it?

  7. What is the cut-off frequency of an RC filter?

  8. What does combinational logic depend on?

  9. Which is De Morgan's law for the complement of an OR?

  10. On a Karnaugh map, in what sizes must groups of 1s be formed?

  11. What does a flip-flop store?

  12. By what factor does an n-bit binary counter divide the clock frequency at its most significant bit?

  13. What is the difference between an astable and a monostable circuit?

  14. Which flowchart symbol represents a decision?

  15. What is the main advantage of programmable control over hard-wired logic?

  16. In a closed-loop control system, what is the error signal?

  17. What is the key feature that makes a control system closed-loop rather than open-loop?