Physics · 2013
JEE Main · 9 April 2013, Shift 1 · Q11
If a carrier wave c ( t )= A sin ω_c t is amplitude modulated by a modulator signal m(t)=A sin ω_m t, then the equation of the modulated signal [ C_m…
If a carrier wave $\displaystyle \mathrm{c}(\mathrm{t})=\mathrm{A} \sin \omega_{\mathrm{c}} \mathrm{t}$ is amplitude modulated by a modulator signal $\displaystyle m(t)=A \sin \omega_m t$, then the equation of the modulated signal $\displaystyle \left[\mathrm{C}_{\mathrm{m}}(\mathrm{t})\right]$ and its modulation index are respectively :
Official answer
(3)
$\displaystyle \mathrm{C}_{\mathrm{m}}(\mathrm{t})=\mathrm{A}\left(1+\sin \omega_{\mathrm{m}} \mathrm{t}\right) \sin \omega_{\mathrm{c}} \mathrm{t}$ and $\displaystyle 1$
More from Communication Systems
- A TV transmission tower has a height of 140 m and the height of the receiving antenna is 40 m. What is the maximum distance upto which signals can be…2019
- The TV transmission tower at a particular station has a height of 125 m. For doubling the coverage of its range, the height of the tower should be…2022
- An amplitude modulated wave is represented by C_m(t)=10(1+0.2 cos 12560 t) sin (111 × 10^4 t) volts. The modulating frequency in kHz will be \ \ \ \.2021
- For sky wave propagation, the radio waves must have a frequency range in between:2014
- The maximum and minimum amplitude of an amplitude modulated wave is 16 V and 8 V respectively. The modulation index for this amplitude modulated wave…2021
- An amplitude modulated signal is plotted below: Which one of the following best describes the above signal?2019
- Which of the following modulated signal has the best noise-tolerance?2013
- Given below are two statements: Statement I: A speech signal of 2 kHz is used to modulate a carrier signal of 1 MHz. The bandwidth requirement for…2021
JEE Main 2013 Physics question, with the answer from NTA’s final answer key. Where our answers come from.