Match List I with List II
| LIST I | LIST II |
| A. Bandwidth | I. information converted into electrical form and suitable for transmission |
| B. Repeater | II. Loss of strength of a signal while propagating through a medium |
| C. Signal | III. Range of frequencies over which communication system work |
| D. Attenuation | IV. Combination of receiver and transmitter |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-III, B-IV, C-I, D-II
These are the basic terms of a communication system, which sends information from a transmitter through a channel to a receiver.
(A) Bandwidth — this matches (III) Range of frequencies over which communication system work. Bandwidth is the frequency range a system handles or a signal occupies.
(B) Repeater — this matches (IV) Combination of receiver and transmitter. A repeater picks up the signal, amplifies it and sends it on again, which extends the range of communication.
(C) Signal — this matches (I) information converted into electrical form and suitable for transmission. The message becomes a signal once it is in electrical form.
(D) Attenuation — this matches (II) Loss of strength of a signal while propagating through a medium. Attenuation is the weakening of the signal along its path.
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 – “… (ii) Signal: Information converted in electrical form and suitable for transmission is called a signal.”
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 – “… (ix) Bandwidth: Bandwidth refers to the frequency range over which an equipment operates or the portion of the spectrum occupied by the signal.”
Basic Terminology Used in Electronic Communication Systems – “… (xii) Repeater: A repeater is a combination of a receiver and a transmitter.”