JEE Main202125 Jul 2021Morning ShiftPhysicsCommunication SystemActual
In amplitude modulation, the message signal V m ( t ) = 10 sin 2 π × 10 5 t volts and carrier signal V C t = 20 sin 2 π × 10 7 t volts. The modulated signal now contains the message signal with lower side band and upper side band frequency, therefore the bandwidth of modulated signal is α kHz . The value of α is:
Options
- A200   kHz
- B500   kHz
- C100   kHz
- D0
Correct answer
A. 200   kHz
Step-by-step solution
Bandwidth = 2 × f m = 2 × 10 5   Hz = 200   kHz