Practice Quiz

Praxis II Physics Content Knowledge Exam Prep

Category - Physics

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A transducer is used to convert mechanical vibrations into electrical waves. The power output of the transducer is of the order of several microwatts. A scientist would like to increase this value so the signal can be recorded to magnetic tape. A circuit based primarily on which of the following components would be most appropriate for this purpose?
  1. Capacitors
  2. Diodes
  3. Transformers
  4. Transistors
Explanation
Correct Response: D. The circuit would be based primarily on transistors because transistors can be used to amplify weak signals. Although answer choices A, B, and C might all be used in the circuits of the amplifier, it is the transistor that performs the amplification of the weak signal from the transducer.
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