A pn junction acts as a__________________?
Correct answer: C. Unidirectional switch
- A. Controlled switch
- B. Bidirectional switch
- C. Unidirectional switch
- D. None of the above
Explanation
A pn junction conducts readily in forward bias but blocks current in reverse bias, so it behaves like a unidirectional switch. It is not a bidirectional switch because reverse conduction is normally only leakage current.
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