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JEE Main 10 Jan 2019 Shift 2 Solved Paper
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© examsnet.com
Question : 9
Total: 90
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 ?
2750 kHz
2000 kHz
2250 kHz
2900 kHz
Validate
Solution:
f
carrier
=
250
0.1
= 2500 KHz
∴ Range of signal = 2250 Hz to 2750 Hz
Now check all options : for 2000 KHZ
f
mod
= 200 Hz
∴ Range = 1800 KHZ to 2200 KHZ
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