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Question

The process of impressing any information by changing the original signal is called


A

diffraction

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B

transmission

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C

attenuation

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D

modulation

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Solution

The correct option is D

modulation


The process of impressing information by changing the original signal is called 'modulation', and it is done in a variety of ways. In all cases the radio waves simply act as a vehicle for the information, so they are commonly called 'carrier waves'.


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