Given below are two statements: Statement I: For transmitting a signal, size of antenna l should be comparable to wavelength of signal, at least l = λ/4 in dimension. Statement II: In amplitude modulation, amplitude of carrier wave remains constant (unchanged). Choose the most appropriate answer:
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Question

Given below are two statements: Statement I: For transmitting a signal, size of antenna l should be comparable to wavelength of signal, at least l = λ/4 in dimension. Statement II: In amplitude modulation, amplitude of carrier wave remains constant (unchanged). Choose the most appropriate answer:

Options

G1 Physics · Accepted Answer

Statement I is correct: a practical transmitting antenna has size of order λ/4. Statement II is incorrect because in amplitude modulation the amplitude of the carrier is varied according to the message signal.