Physics · 2019
JEE Main · 9 April 2019, Shift 1 · Q28
A signal A cos ω t is transmitted using v_0 sin ω_0 t as carrier wave. The correct amplitude modulated (AM) signal is:
A signal A $\displaystyle \cos \omega \mathrm{t}$ is transmitted using $\displaystyle v_0 \sin \omega_0 \mathrm{t}$ as carrier wave. The correct amplitude modulated (AM) signal is :
Official answer
(3)
$\displaystyle v_0 \sin \omega_0 \mathrm{t}+\frac{\mathrm{A}}{2} \sin \left(\omega_0-\omega\right) \mathrm{t}+\frac{\mathrm{A}}{2} \sin \left(\omega_0+\omega\right) \mathrm{t}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.