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JEE PHYSICS MCQ: COMMUNICATION SYSTEMS

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Given the electric field of a complete amplitude modulated wave as

\vec{E}=\hat{i} E_c\left(1+\frac{E_m}{E_c} \cos \omega_m t\right) \cos \omega_c t.

Where the subscript

c

stands for the carrier wave and

{m}

for the modulating signal. The frequencies present in the modulated wave are

View answer and explanation

Correct option: B

\omega_c, \omega_c+\omega_m

and

\omega_c-\omega_m

Option B (

\omega_c, \omega_c+\omega_m

and

\omega_c-\omega_m

) is correct because amplitude modulation generates the carrier frequency and sideband frequencies.

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