Question

Match List I with List II

List I	List II
(A) Zener Diode	(II) Voltage Regulator
(B) LED	(III) Remote Control
(C) Rectifier	(IV) AC to DC
(D) Photo diode	(I) Detect optical signal

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-IV, C-I, D-III
• C. A-III, B-II, C-IV, D-I
• D. A-II, B-III, C-IV, D-I

Hint:

When matching components to their uses, think about their main functions in circuits. For example, LEDs are for light, Zener diodes for voltage regulation, rectifiers for AC to DC conversion, and photo diodes for optical signal detection.

Answer 1

The Correct Option is A

- Zener Diode (A): Zener diodes are typically used as voltage regulators due to their ability to maintain a steady voltage across them when reverse biased. Therefore, the correct match is A-I.
- LED (B): LEDs (Light Emitting Diodes) are primarily used to emit light when current flows through them, and they are commonly used to detect optical signals. Hence, the correct match is B-II.
- Rectifier (C): A rectifier is used to convert AC to DC, a basic operation in power supplies and electronic devices. Thus, C-IV is the correct match.
- Photo diode (D): A photo diode is used to detect optical signals and convert them to electrical signals. Thus, D-III is the correct match.
Thus, the correct matching of List I with List II is: \[ A-I, B-II, C-III, D-IV \]