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 ?

Question

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 ? (A) 2750 kHz (B) 2000 kHz (C) 2250 kHz (D) 2900 kHz

Tardigrade Admin · Accepted Answer

f textcarrier = (250/0.1) 2500 KHZ ∴ Range of signal = 2250 Hz to 2750 Hz Now check all options: for 2000 KHZ fmod = 200 Hz ∴ Range = 1800 KHZ to 2200 KHZ

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

2750 kHz

2000 kHz

2250 kHz

2900 kHz

$f_{carrier} = \frac{250}{0.1} 2500 KH Z$
$∴$ Range of signal = $2250 Hz$ to $2750 Hz$
Now check all options : for $2000 KH Z$
$f_{m o d} = 200 Hz$
$∴$ Range = $1800 KH Z$ to $2200 KH Z$

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