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monster
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star
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rocket
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banana
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thief
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gift
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5
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True or False: An amplifier creates new energy out of thin air to make a signal louder.
True
False
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10
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A pre-amplifier is usually the very last stage in an audio system before the speakers.
True
False
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10
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Name three common "Classes" of amplifiers.
Class A, Class B, Class AB, Class C, or Class D.
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25
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What does "Clipping" look like on an oscilloscope, and what causes it?
The top and bottom of the waveform look "flat" or cut off. It happens when the amplifier is pushed beyond its maximum voltage capability.
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banana
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gift
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fairy
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thief
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5
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The "Gain" of an amplifier refers to the ratio of output signal to input signal.
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False
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25
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What is the purpose of a Heat Sink in a high-power amplifier?
To dissipate the heat generated by the transistors or tubes to prevent the components from burning out.
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10
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What are the three main terminals of a Bipolar Junction Transistor (BJT) used in amplifying?
Emitter, Base, and Collector.
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boom
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rocket
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banana
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What are two advantages of a Class D amplifier over a Class A amplifier?
They are much more efficient and produce significantly less heat.
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25
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What is the main difference between a Transistor and a Vacuum Tube amplifier?
Transistors use semiconductor material (solid-state), while tubes use heated filaments in a glass vacuum.
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20
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List two components often used as the "active element" in an amplifier to provide gain.
Transistors (BJTs/MOSFETs), Vacuum Tubes, or Operational Amplifiers (Op-Amps).
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25
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In an amplifier, what is the "Signal-to-Noise Ratio" (SNR)?
A measure that compares the level of a desired signal to the level of background noise. (The higher the ratio, the cleaner the sound).
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In the context of amplifiers, what does the term "Distortion" mean?
An unwanted change in the waveform where the output does not perfectly match the input shape.
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