Question:
If thehighest frequency modulating a carrier is $5 \mathrm{kHz}_{4}$ then the number of $\mathrm{AM}$ broadcast stations accommodated in a $90 \mathrm{kHz}$ bandwidth are
Solution:
No. of station $=\frac{\text { Band width }}{2 \times \text { Highest Band width }}$
$\Rightarrow \frac{90}{2 \times 5}$
$\Rightarrow 9$