JEE Main 2017 · 2 Apr · Shift 1 · Physics Q28

← JEE Main 2017 · 2 Apr · Shift 1

PhysicsSingle correct+4 / -1Question 28 of 90

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 ?

\omega_m

\omega_c

\omega_m+\omega_c

\omega_c-\omega_m

Answer and worked solution

Official answer: A

An AM wave contains the carrier $\omega_c$ and the side bands $\omega_c\pm\omega_m$ . The signal frequency $\omega_m$ itself is not present.

Topics:Modulation

← Previous question Next question →

JEE Main 2017 · 2 Apr · Shift 1, Physics question 28