Sol. Given, Signal frequency $f_{\mathrm{Ar}}=5 \mathrm{kHz}$ Carrier wave frequency $\mathrm{f}_{\mathrm{c}}=2 \mathrm{MHz}$ $$ \mathrm{f}_{\mathrm{c}}=2000 \mathrm{KHz} $$ The resultant signal will have band width of frequency given by $$ \begin{array}{ll} & {\left[\left(f_{\mathrm{c}}+f_{\mathrm{cm}}\right)-\left(f_{\mathrm{c}}-f_{\mathrm{ch}}\right)\right]} \\ \Rightarrow & {[(2000+5)-(2000-5)] \mathrm{kHz}} \\ \Rightarrow & 10 \mathrm{kHz} \end{array} $$