Question:
A \(5\) kHz frequency signal is amplitude modulated on a carrier wave of frequency \(2\) MHz.
- One possible frequency of the resultant signal is
A \(5\) kHz frequency signal is amplitude modulated on a carrier wave of frequency \(2\) MHz.
- One possible frequency of the resultant signal is
Show Hint
In amplitude modulation (AM), the resultant signal contains the carrier frequency \( f_c \) and two sidebands at:
\[
f_{\text{upper}} = f_c + f_m, \quad f_{\text{lower}} = f_c - f_m
\]
Always use these formulas to determine possible frequencies in AM signals.
Updated On: May 5, 2026
- \(1995 \, \text{kHz}\)
- \(1985 \, \text{kHz}\)
- \(1975 \, \text{kHz}\)
- \(1965 \, \text{kHz}\)
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Sideband frequencies in AM
\[ f_{\text{upper}} = f_c + f_m, \quad f_{\text{lower}} = f_c - f_m \]
\[ f_c = 2000 \, \text{kHz}, \quad f_m = 5 \, \text{kHz} \]
Step 2: Calculate sidebands
\[ f_{\text{upper}} = 2000 + 5 = 2005 \, \text{kHz} \]
\[ f_{\text{lower}} = 2000 - 5 = 1995 \, \text{kHz} \]
Final Answer: \( 1995 \, \text{kHz} \)
Was this answer helpful?
0
0
Top TS EAMCET Physics Questions
- A wooden box lying at rest on an inclined surface of a wet wood is held at static equilibrium by a constant force $F$ applied perpendicular to the incline. If the mass of the box is $1\,kg$, the angle of inclination is $30^{\circ}$ and the coefficient of static friction between the box and the inclined plane is $0.2$, the minimum magnitude of $\vec{F}$ is (Use $ g = 10\,m/s^2$)
- A metre scale made of steel reads accurately at $25^{\circ} C$ . Suppose in an experiment an accuracy of $0.06\, mm$ in $1\,m$ is required, the range of temperature in which the experiment can be performed with this metre scale is (coefficient of linear expansion of steel is $ 11 \times 10^{-6} /^{\circ} \, C$ )
- Consider a solenoid carrying current supplied by a DC source with a constant emf containing iron core inside it. When the core is pulled out of the solenoid, the change in current will
- A parallel beam of light of intensity \(I_0\) is incident on a coated glass plate. If \(25\%\) of the incident light is reflected from the upper surface and \(50\%\) of light is reflected from the lower surface of the glass plate, the ratio of maximum to minimum intensity in the interference region of the reflected light is
- A thermocol box has a total wall area (including the lid) of $1.0 m ^{2}$ and wall thickness of $3 cm$. It is filled with ice at $0^{\circ} C$. If the average temperature outside the box is $30^{\circ} C$ throughout the day, the amount of ice that melts in one day is [Use $K_{\text {thermocol }}=0.03 W / mK$ $.L_{\text {fusion (ice) }}=3.00 \times 10^{5} J / kg ]$
View More Questions
Top TS EAMCET Nuclear physics Questions
- Which of the following is emitted when $^{239}_{94} Pu$ decays into $^{235}_{92}U$ ?
Heavy water is used to moderate in nuclear reactor because
- In a nuclear reactor of efficiency 25\%, the number of fissions taking place per second is \( 5 \times 10^{13} \). If 200 MeV energy is released per fission, then the output power of the reactor is:
- In a radioactive sample \( 2 \times 10^8 \) nuclei reduce to \( 10^8 \) nuclei in 15 minutes, then the half-life of the sample in minutes is:
- An $\alpha$-particle of energy \( E \) is liberated during the decay of a nucleus of mass number 236. The total energy released in this process is 236. The total energy released in this process is
View More Questions
Top TS EAMCET Questions
- A bag contains $5$ red balls, $3$ black balls and $4$ white balls are drawn at random. The probability that they are not of same colour is
- If $cosec\, \theta - \cot \theta = 2017$, then quadrant in which $\theta $ lies is
- If $a$ is a unit vector, then $| a \times \hat{ i }|^{2}+| a \times \hat{ j }|^{2}+| a \times \hat{ k }|^{2}=$
- $A$ straight line makes an intercept on the $Y$-axis twice as long as that on $X$-axis and is at a unit distance from the origin. Then the line is represented by the equations
- Let $S$ and $S'$ be the foci of an ellipse and B be one end of its minor axis. If $SBS'$ is an isosceles right angled triangle then the eccentricity of the ellipse is
View More Questions