Match List - I with List - II.
| List - I | List - II |
| (A) Range | (I) Range of frequencies over which communication system works |
| (B) Band width | (II) The largest distance between transmitter and receiver |
| (C) Attenuation | (III) A device that has input in electrical form or provides output in electrical form |
| (D) Transducer | (IV) Loss of strength of a signal during propagation |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
These are the basic terms used to describe a communication system, which sends a signal from a transmitter to a receiver through a channel.
(A) Range — this matches (II) The largest distance between transmitter and receiver. Range is a distance: the farthest point from the source up to which the signal can still be received with enough strength.
(B) Band width — this matches (I) Range of frequencies over which communication system works. Bandwidth is a span of frequencies, not a distance; it decides how much information the system can carry.
(C) Attenuation — this matches (IV) Loss of strength of a signal during propagation. As the signal travels through the medium, part of its energy is lost, so it grows weaker with distance.
(D) Transducer — this matches (III) A device that has input in electrical form or provides output in electrical form. A transducer converts one form of energy into another, such as a microphone (sound to electrical) or a loudspeaker (electrical to sound).
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic was removed from the latest NCERT book (2026-27), and it also appears to be out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
Basic Terminology Used in Electronic Communication Systems – “… (i) Transducer: Any device that converts one form of energy into another can be termed as a transducer. In electronic communication systems, we usually come across devices that have either their inputs or outputs in the electrical form.”
Basic Terminology Used in Electronic Communication Systems – “… (vi) Attenuation: The loss of strength of a signal while propagating through a medium is known as attenuation.”
Basic Terminology Used in Electronic Communication Systems – “… (viii) Range: It is the largest distance between a source and a destination up to which the signal is received with sufficient strength. (ix) Bandwidth: Bandwidth refers to the frequency range over which an equipment operates or the portion of the spectrum occupied by the signal.”