NA

Correct Option: C

NA

Since threshold effect can occur on those demodulating systems which use envelop detector for demodulating the signal.
We always use envelop detection for demodulating AM wave, and usually envelop detection for demodulating FM signal, as it is
low cost process. Hence alternative (C) is the correct choice.

Correct Option: C

Since threshold effect can occur on those demodulating systems which use envelop detector for demodulating the signal.
We always use envelop detection for demodulating AM wave, and usually envelop detection for demodulating FM signal, as it is
low cost process. Hence alternative (C) is the correct choice.

Correct Option: D

Subtracting equation (i) and (ii) we get
2Δf_m = 0·22 MHz
or
Δf_m = 0·11 MHz

Correct Option: A

Subtracting equation (i) and (ii) we get
2Δf_m = 0·22 MHz
or
Δf_m = 0·11 MHz

Given, f_c + Δ f_m = 107·218 MHz …(i)
f_c + Δf_m = 107·196 MHz …(ii)
adding equations (i) and (ii),
we get
2f_c = (107·218 + 107·196) MHz
or
f_c = 107·207 MHz

Correct Option: B

Given, f_c + Δ f_m = 107·218 MHz …(i)
f_c + Δf_m = 107·196 MHz …(ii)
adding equations (i) and (ii),
we get
2f_c = (107·218 + 107·196) MHz
or
f_c = 107·207 MHz