The working of transistor as amplifier is similar to________________?
Correct answer: D. Triode vacuum tube
- A. Step up transformer
- B. Step down transformer
- C. Three diodes in common
- D. Triode vacuum tube
Explanation
A transistor amplifier, like a triode vacuum tube, uses a small input signal to control a much larger output signal through a controlled flow of charge. A transformer can change voltage but does not provide the same transistor control action, so option a is the likely distractor.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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