Question

Match List I with List II: 

List I		List II
A.	Attenuation	I.	Combination of a receiver and transmitter
B.	Transducer	II.	Process of retrieval of information from the carrier wave at received
C.	Demodulation	III.	Converts one form of energy into another
D.	Repeater	IV.	Loss of strength of a signal while propagating through a medium

Choose the correct answer from the options given below :

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

Answer 1

The Correct Option is B

To solve this matching question, we need to understand the meaning of each term in List I and pair it with the correct concept in List II:

1. Attenuation: This term refers to the reduction in the strength of a signal as it travels through a medium. It is commonly associated with signal loss. Therefore, it matches with IV. Loss of strength of a signal while propagating through a medium.
2. Transducer: A transducer is a device that converts one form of energy into another. An example would be a microphone, which converts sound energy into electrical energy. Hence, it corresponds with III. Converts one form of energy into another.
3. Demodulation: This is the process of extracting the original information-bearing signal from a modulated carrier wave. It involves reversing the modulation process so that the original message can be retrieved at the receiver's end. Thus, it aligns with II. Process of retrieval of information from the carrier wave at received.
4. Repeater: A repeater is a combination of a receiver and a transmitter. It receives a weak or low-level signal, amplifies it, and then retransmits it at a higher power so that the signal can cover longer distances without significant loss. This matches with I. Combination of a receiver and transmitter.

Based on the above explanations, the correct matching option is:

• A-IV: Attenuation - Loss of strength of a signal while propagating through a medium
• B-III: Transducer - Converts one form of energy into another
• C-II: Demodulation - Process of retrieval of information from the carrier wave at received
• D-I: Repeater - Combination of a receiver and transmitter

Thus, the correct answer is: A-IV, B-III, C-II, D-I.