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 |
List I | List II | ||
A | AM Broadcast | I | 88-108 MHz |
B | FM Broadcast | II | 540-1600 kHz |
C | Television | III | 3.7-4.2 GHz |
D | Satellite Communication | IV | 54 MHz-890 MHz |
Choose the correct answer from the options given below:
What should be the minimum size of antenna required for successful transmission of wave having wavelength \(\lambda\)
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
A system that describes the information exchange between two points is called the communication system. The transmission and reception process of information is called communication. The major elements of communication are such as:
The following are the examples of communication systems:
Turning on Signal specification or technology, the communication system is categorized as follows: