Question

A pn junction diode without bias acts as:

• A. Transistor
• B. Resistor
• C. Voltage regulator
• D. AC transformer

Hint:

A pn junction diode behaves as a resistor under zero bias conditions, and it behaves like a rectifier when forward biased.

Answer 1

The Correct Option is B

A pn junction diode without bias behaves as a resistor. This is because, when no bias is applied to the pn junction diode, it doesn't conduct current effectively, behaving as a high-resistance component. However, when forward bias is applied, the diode allows current to flow, and its behavior changes.
Thus, the correct answer is \( \text{Resistor} \).