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## Q. 1.1.19

Find the correct match between Group-1 andGroup-2.

Group-1

P. {$\{1+ km (t)\} A \sin \left(\omega_{c} t\right)$

Q. $km (t) A \sin \left(\omega_{c} t\right)$

R. $A \sin \left\{\omega_{c} t+ km (t)\right\}$

S. $A \sin \left[\omega_{c} t+k \int_{-\infty}^{t} m(t) d t\right]$

Group-2

W.  Phase modulation

X.   Frequency modulation

Y.   Amplitude modulation

Z.   DSB-SC modulation

(a)  P-Z, Q-Y, R-X, S-W

(b)  P-W, Q-X, R-Y, S-Z

(c)  P-X, Q-W, R-Z, S-Y

(d)  P-Y, Q-Z, R-W, S-X

## Verified Solution

Correct combination will be as followed

$\text { P. } \quad\{1+ km (t)\} A \sin \left(\omega_{ c } t\right)$ Amplitude modulation

$\text { Q. } \operatorname{km}(t) A \sin \left(\omega_{c} t\right)$ DSB-SC modulation

$\text { R. } \quad A \sin \left\{\omega_{c} t+ km (t)\right\}$ Phase modulation

$\text { S. } A \sin \left[\omega_{c} t+k \int_{-\infty}^{t} m(t) d t\right]$ Frequency modulation

Hence, the correct option is (d).