Q160 / 160 · TS EAMCET 2022 (18 Jul Shift 2) · Physics

A message signal of frequency $15 kHz$ is used to modulate a carrier of frequency $v_{c}$ . If the side bands produced are $1515 kHz$ and $1485 kHz$ , then $v_{c}$ is

A
$2.0 MHz$
Correct answer
B
$1.5 MHz$
C
$2.5 MHz$
D
$3.0 MHz$

Solution

Frequency of the side bands = Carrier frequency $\pm$ Message frequency
$= ν_{c} \pm 15 kHz$
Therefore, $ν_{c} + 15 kHz = 1515 kHz$
and $ν_{c} - 15 kHz = 1485 kHz$
$\Rightarrow ν_{c} = 1515 - 15 = 1500 kHz = 1.5 MHz$

Hence, the correct answer is option: 'B'.

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A message signal of frequency 15 kHz is used to modulate a carrier of frequency vc. If the side bands produced are 1515 kHz and 1485 kHz, then vc is

Solution

Relevant Questions

A message signal of frequency $15 kHz$ is used to modulate a carrier of frequency $v_{c}$ . If the side bands produced are $1515 kHz$ and $1485 kHz$ , then $v_{c}$ is