TS EAMCET · Physics · Communication System
An amplitude modulated wave is represented by \(c_m(t)= 10[1+0.6 \sin (1250 \mathrm{t})] \sin \left(10^8 \mathrm{t}\right)\). Then the modulation index is
- A \(10\)
- B \(1250\)
- C \(10^8\)
- D \(0.6\)
Answer & Solution
Correct Answer
(D) \(0.6\)
Step-by-step Solution
Detailed explanation
\(C_m=10\left[1+0.6 \sin (250 t] \sin \left(10^8 t\right)\right.\) Compair with \(C_m=A_c\left[1+\mu \sin \left(\omega_m t\right)\right] \sin \left(\omega_c t\right)\) Modulation, index, \(\mu=0.6\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A body of mass \(m_1=4 \mathrm{~kg}\) moves at \(5 \hat{\mathbf{i}} \mathrm{m} / \mathrm{s}\) and another body of mass \(m_2=2 \mathrm{~kg}\) moves at \(10 \hat{\mathbf{i}} \mathrm{m} / \mathrm{s}\). The kinetic energy of centre of mass isTS EAMCET 2010 Hard
- An iron sphere of mass \(20 \times 10^{-3} \mathrm{~kg}\) falls through a viscous liquid with terminal velocity \(0.5 \mathrm{~ms}^{-1}\). The terminal velocity (in \(\mathrm{ms}^{-1}\) ) of another iron sphere of mass \(54 \times 10^{-2} \mathrm{~kg}\) isTS EAMCET 2005 Medium
- In a transistor circuit, when the base current is increased by 50 micro-amperes keeping the collector voltage fixed at 2 volts, the collector current increases by \(1 \mathrm{~mA}\). The current gain of the transistor isTS EAMCET 2002 Easy
- An ideal monoatomic gas of volume is adiabatically expanded to a volume at The final temperature in Kelvins is
(use )TS EAMCET 2021 Medium - A conductor of resistance \(3 \Omega\) is stretched uniformly till its length is doubled. The wire is now bent in the form of an equilateral triangle. The effective resistance between the ends of any side of the triangle in ohms isTS EAMCET 2002 Medium
- Select the physical quantities in Column-I and Column-II having same dimensions.
The correct answer is
\(\begin{array}{llll}
\mathbf{A} & \mathbf{B} & \mathbf{C} & \mathbf{D}
\end{array}\)TS EAMCET 2022 Easy
More PYQs from TS EAMCET
- Two rods whose lengths are and with heat conductivity co-efficients and are placed end to end. The heat conductivity coefficient of a uniform rod of length whose conductivity is same as that of the system of these two rods isTS EAMCET 2021 Easy
- A photon of energy \(4 \mathrm{eV}\) imparts all its energy to an electron that leaves a metal surface with \(1.1 \mathrm{eV}\) of kinetic energy. The work function of the metal isTS EAMCET 2018 Easy
- The molar specific heat of a monoatomic gas at constant pressure is (Universal gas constant \(=8.3 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\) )TS EAMCET 2025 Easy
- The concept of displacement current solves an ambiguity inTS EAMCET 2019 Easy
- Two soap bubbles combine to form a single bubble. In this process, the change in volume and surface area are respectively \(V\) and \(A\). If \(P\) is the atmospheric pressure, and \(T\) is the surface tension of the soap solution, the following relation is true :TS EAMCET 2006 Hard
- A conducting sphere \(S_1\) of radius \(r_1\) is connected by a conducting wire to another conducting sphere \(S_2\) of radius \(r_2\), where \(r_1=3 \mathrm{~cm}\) and \(r_2=2\) \(\mathrm{cm}\). Before they are connected, \(s_1\) carries charge of 10 units. The electric potential at the point which is at a distance \(4 \mathrm{~cm}\) from the centre of \(S_1\) and a distance \(3 \mathrm{~cm}\) from the centre of \(S_2\) isTS EAMCET 2018 Hard