‹ PrevQuestion 75 / 75 · latest first
Physics · 2020
JEE Main · 2 September 2020, Shift 1 · Q19
An amplitude modulated wave is represented by the expression v_m =5(1+0.6 cos 6280 t ) sin (211 × 10^4 t ) volts The minimum and maximum amplitudes…
An amplitude modulated wave is represented by the expression
$$v_{\mathrm{m}}=5(1+0.6 \cos 6280 \mathrm{t}) \sin \left(211 \times 10^4 \mathrm{t}\right)
$$
volts
The minimum and maximum amplitudes of the amplitude modulated wave are, respectively :
Official answer
(1)
$\displaystyle \frac{5}{2} \mathrm{~V}, 8 \mathrm{~V}$
(4)
$\displaystyle 5 \mathrm{~V}, 8 \mathrm{~V}$
NTA’s answer key accepts either.
More from Communication Systems
- 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
- 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
- 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
- A modulating signal 2 sin (6.28 × 10^6) t is added to the carrier signal 4 sin (12.56 × 10^9) t for amplitude modulation. The combined signal is…2022
- A message signal of frequency 3 kHz is used to modulate a carrier signal of frequency 1.5 MHz. The bandwidth of the amplitude modulated wave is2023
- Match List I with List II Choose the correct answer from the options given below:2023
- A TV transmission tower antenna is at a height of 20 m. Suppose that the receiving antenna is at. (i) ground level (ii) a height of 5 m. The increase…2021
JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.