P -n junction when reversed biased acts as a:
Correct answer: D. Off switch
- A. Capacitor
- B. Inductor
- C. On switch
- D. Off switch
Explanation
A p-n junction diode acts as an off switch when operating in a reverse-biased region. When a diode or any two-terminal component is connected in a circuit, it has two biased conditions with the given supply: forward bias and reverse bias. In reverse bias, the anode is connected to the negative terminal and the cathode to the positive terminal of the supply. A diode cannot conduct in reverse bias and hence is an open switch.
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About Electronics
A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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