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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Communication Systems
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An antenna is a device:

$\begin {array} {1 1} (a)\;that\: converts\: electromagnetic\: energy\: into\: radio\: frequency \: signal. \\ (b)\;that \: converts\: frequency\: signal\: into\: electromagnetic\: energy. \\ (c)\;that\: converts\: guided\: electromagnetic\: waves \: into\: free\: space\: electromagnetic\: waves\: and\: vice-versa. \\ (d)\;None\: of \: these \end {array}$


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An antenna is a metallic structure used to radiate or receive EM waves.
Ans : (c)
answered Feb 25, 2014 by thanvigandhi_1

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