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JEE Main202117 Mar 2021Evening ShiftPhysicsCommunication SystemActual

A carrier signal C ( t ) = 25 sin 2 . 512 × 10 10 t is amplitude modulated by a message signal m ( t ) = 5 sin 1 . 57 × 10 8 t and transmitted through an antenna. What will be the bandwidth of the modulated signal ?

Options

  1. A8 GHz
  2. B2 . 01 GHz
  3. C1987 . 5 MHz
  4. D50 MHz

Correct answer

D. 50 MHz

Step-by-step solution

Band width = 2 f m ω m = 1 . 57 × 10 8 = 2 π f m BW = 2 f m = 10 8 2   Hz = 50 MHz

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