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Difficulty: EasyTransistors

Solid-state electronic systems rely heavily on transistors for signal processing and power control. What are the two primary functions that a transistor performs in an electronic circuit?

  1. A
    Converting alternating current to direct current through rectification
  2. Amplifying electrical signals and acting as an electronic switchAnswer
  3. C
    Storing electrical energy within an electrostatic field
  4. D
    Stepping up or down alternating voltages using electromagnetic induction

Answer

Amplifying electrical signals and acting as an electronic switch
Transistors are three-terminal active semiconductor devices designed to amplify weak electrical signals (such as audio or radio frequencies) and to serve as high-speed solid-state switches in digital logic circuits and power controllers.

Step-by-Step Solution

1
Identify the fundamental operational modes of a transistor in electronic circuits.
Transistors operate linearly in the active region to boost signal strength and non-linearly in cutoff/saturation regions to turn currents on and off.
Recognizing the functional scope of active semiconductor devices distinguishes them from passive components.
2
Match the identified operational modes with the standard electronic roles.
The two primary roles are amplification (signal gain) and switching (binary on/off control).
Alternative functions like rectification belong to diodes, charge storage belongs to capacitors, and inductive transformation belongs to transformers.

Key Concept

Primary functions of transistors (amplification and switching)
Estimated Time:45s
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Topics

Transistors

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