Question

Match List-I with List-II

\[ \begin{array}{|l|l|} \hline \textbf{List-I} & \textbf{List-II} \\ \hline (A) \; \text{Zener diode} & (I) \; \text{Negative resistance region} \\ (B) \; \text{Tunnel diode} & (II) \; \text{Voltage regulator} \\ (C) \; \text{Rectifier} & (III) \; \text{Pulsating d.c.} \\ (D) \; \text{Light emitting diode} & (IV) \; \text{Gallium Arsenide phosphide (GaAsP)} \\ \hline \end{array} \]
Choose the correct answer from the options given below:

• (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)

Hint:

Associate each electronic component with its key unique feature:
Zener Diode \(\rightarrow\) Reverse Breakdown, Voltage Regulation
Tunnel Diode \(\rightarrow\) Heavy Doping, Negative Resistance
Rectifier \(\rightarrow\) AC to DC conversion, Pulsating DC Output
LED \(\rightarrow\) Light Emission, specific semiconductor materials for colors (e.g., GaAsP, GaN)

Answer 1

The Correct Option is A

Objective: To identify the primary application or characteristic property of semiconductor devices. Methodology: Each device from List-I is analyzed to determine its corresponding match in List-II. Analysis:

• (A) Zener diode: Operates in the reverse breakdown region, maintaining a stable voltage irrespective of current. This makes it suitable for voltage regulation. Match: (II).
• (B) Tunnel diode: Exhibits a negative resistance region in its forward-bias I-V curve due to quantum tunneling. This property is used in high-frequency oscillators. Match: (I).
• (C) Rectifier: Converts AC to DC, producing a pulsating DC output that requires filtering for steady DC. Match: (III).
• (D) Light emitting diode (LED): Emits light when current flows through it. Gallium Arsenide Phosphide (GaAsP) is a material used for red, orange, and yellow LEDs. Match: (IV).

Conclusion: The correct pairings are (A)-(II), (B)-(I), (C)-(III), and (D)-(IV), corresponding to option (A).