Lesson: Chapter 11 — Electronics

The transistor at work 3 of 5 Reset answers

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Question 3

In the signal amplifier, why is the 0.1 µF capacitor there?

A To bias the base at 0.7 V B To make the sound louder C To pass only the alternating signal to the base D To store energy for the speaker

The right answer is the one marked above.

To pass only the alternating signal to the base. The 22 kΩ resistor provides the 0.7 V bias.

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