JEE Main Solved Paper 2017 Question 5

Question: In amplitude modulation, sinusoidal carrier frequency used is denoted by $ {\omega_c} $ and the signal frequency is denoted by $ {\omega_m}. $ The bandwidth $ (\Delta {\omega_m}) $ of the signal is such that $ \Delta {\omega_m}«{\omega_c}. $ Which of the following frequencies is not contained in the modulated wave? JEE Main Solved Paper-2017

Options:

A) $ {\omega_m}+{\omega_c} $

B) $ {\omega_c}-{\omega_m} $

C) $ {\omega_m} $

D) $ {\omega_c} $

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Answer:

Correct Answer: C

Solution:

  • Three frequencies are contained $ {\omega_m}+{\omega_c},{\omega_c}-{\omega_m}\And {\omega_c} $