Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Communication System

NTA Abhyas 2020 · Physics · Communication System

A signal wave of frequency 12 kHz is modulated with a carrier wave...

A signal wave of frequency 12 kHz is modulated with a carrier wave of frequency 2.51 MHz. The upper and lower side band frequencies are respectively

Options

  1. A2512 kHz and 2508 kHz
  2. B2522 kHz and 2488 kHz
  3. C2522 kHz and 2498 kHz
  4. D2512 kHz and 2488 kHz

Correct answer

C. 2522 kHz and 2498 kHz

Step-by-step solution

Upper side band (USB) frequency =fc+fm= {f}_{c} + {f}_{m}

=(2.51)MHz+(12)kHz=(2510+12)kHz=2522kHz= \left(2.51\right)MHz + \left(12\right)kHz = \left(2510 + 12\right)kHz = 2522kHz

Lower side band (LSB) frequency =fc−fm= {f}_{c} - {f}_{m}

=(2.51)MHz−(12)kHz=(2510−12)kHz=2498kHz= \left(2.51\right)MHz - \left(12\right)kHz = \left(2510 - 12\right)kHz = 2498kHz
Practice Communication System on Quantrex Academy →

More from Communication System

The height of transmitting antenna is 180m and the height of the receiving antenna is… JEE Main 2023To radiate EM signal of wavelength λ with high efficiency, the antennas should have a… JEE Main 2023Match List-I with List-II List-I (Layer of atmosphere) List-II (Approximate height over… JEE Main 2023The amplitude of 15 ( 1000 ) is modulated by 10 ( 4 ) signal. The amplitude modulated… JEE Main 2023In satellite communication, the uplink frequency band used is: JEE Main 2023A transmitting antenna is kept on the surface of the earth. The minimum height of… JEE Main 2023A massage signal of frequency 3kHz is used to modulate a carrier signal of frequency 1 .… JEE Main 2023A carrier wave of amplitude 15V is modulated by a sinusoidal base band signal of… JEE Main 2023 Full Communication System list All NTA Abhyas JEE Main PYQs