Verified Solution • 2025–26 Session moderate

QJEEM19Ph31db: JEE Main 2019 Physics - Class 12 JEEM19Ph31db Solution: The modulation frequency of an AM radio station is 250 kHz,…

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 ?

Multiple Choice Options

  • A 2900 kHz
  • B 2750 kHz
  • C 2250 kHz
  • D 2000 kz

Step-by-Step Verified Solution

fcarrier = 2500.1 = 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

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