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WJEC A-Level Electronics Semiconductor Components overview quiz quiz

14questions. Pick an answer and you'll see why right away.

  1. In an n-type semiconductor, the majority charge carriers are:

  2. Approximately what forward voltage is needed before a silicon diode conducts significantly?

  3. A Zener diode is normally operated in:

  4. A photodiode used as a light sensor is operated in:

  5. In reverse bias, the depletion layer of a diode:

  6. A transistor used as a switch should operate only in cut-off and:

  7. The base current needed to saturate a bipolar transistor switch is given by:

  8. Which is an advantage of a MOSFET over a bipolar transistor as a switch?

  9. When a transistor switch turns on (saturates), the collector-emitter voltage is approximately:

  10. Why is a Darlington pair used in some switching circuits?

  11. For a common-emitter amplifier with an unbypassed emitter resistor, the voltage gain is approximately:

  12. The output of a common-emitter amplifier is inverted because as the input rises:

  13. What is the purpose of the coupling capacitors in a common-emitter amplifier?

  14. Why is a transistor amplifier biased so the quiescent collector voltage is near half the supply?