Q. The modulation frequency of an AM radio station is 250 kHz, which is 10% of the carrier wave. If another AM station approaches you for license what broadcast frequency will you allot ?


$f_{\text{carrier}} = \frac{250}{0.1} 2500\, KHZ$
$ \therefore$ Range of signal = 2250 Hz to 2750 Hz
Now check all options : for 2000 KHZ
$f_{mod} = 200 \; Hz$
$\therefore $ Range = 1800 KHZ to 2200 KHZ

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