An antenna is a device:

  • A
    That converts electromagnetic energy into radio frequency signal
  • B
    That converts radio frequency signal into electromagnetic energy
  • C
    That converts guided electromagnetic waves into free space electromagnetic waves and vice-versa
  • D
    None of these

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Choose the correct statement for amplitude modulation.

$A$ carrier wave of amplitude $15\,V$ is modulated by a sinusoidal baseband signal of amplitude $3\,V$. The ratio of maximum amplitude to minimum amplitude in an amplitude modulated wave is:

What type of modulation is employed in India for radio transmission?

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