Official PYQ · 2005Set 1 · Q22Analog CommunicationsMCQ1 mark

GATE EC 2005 Set 1 Q22 — Analog Communications

Find the correct match between group $1$ and group $2.$
Group I
$\begin{array}{l} \mathrm{P}-\{1+k m(t)\} \mathrm{A} \sin \left(\omega_{c} t\right) \\ \mathrm{Q}-k m(t) \mathrm{A} \sin \left(\omega_{c} t\right) \\ \mathrm{R}-\mathrm{A} \sin \left\{\omega_{c} t+k m(t)\right\} \\ \mathrm{S}-\mathrm{A} \sin \left(\omega_{c} t+k \int_{-\infty}^{t} m(t) d t\right) \end{array}$

Group Il
$\mathbf{W}$ - Phase modulation
$\mathbf{X}$ - Frequency modulation
$\mathbf{Y}$ - Amplitude modulation
$\mathbf{Z}$ - DSB-SC modulation

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Answer: D

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Published 10 Oct 2026

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