MCQ
If $f_a$ and $f_f$ represent the carrier wave frequencies for amplitude and frequency modulations respectively, then
  • A
    $\mathrm{f}_{\mathrm{a}}>\mathrm{f}_{\mathrm{f}}$
  • $\mathrm{f}_{\mathrm{a}}<\mathrm{f}_{\mathrm{f}}$
  • C
    $f_a \approx f_f$
  • D
    $\mathrm{f}_{\mathrm{a}} \geq \mathrm{f}_{\mathrm{f}}$

Answer

Correct option: B.
$\mathrm{f}_{\mathrm{a}}<\mathrm{f}_{\mathrm{f}}$
$\mathrm{f}_{\mathrm{a}}<\mathrm{f}_{\mathrm{f}}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A region surrounding a stationary electric dipoles has(a) Magnetic field only(b) Electric field only(c) Both electric and magnetic fields(d) No electric and magnetic fields
   
   
A rope $1\ cm$ in diameter breaks if the tension in it exceeds $500N.$ The maximum tension that may be given to a similar rope of diameter $2\ cm$ is:
A point $Q$ lies on the perpendicular bisector of an electrical dipole of dipole moment $p$. If the distance of $Q$  from the dipole is $r\ ($much larger than the size of the dipole$),$ then electric field at $Q$ is proportional to
A solid at temperature $T_1$ is kept in an evacuated chamber at temperature $\text{T}_2>\text{T}1.$ The rate of increase of temperature of the body is proportional to:
A proton and an alpha particle both enter a region of uniform magnetic field B, moving at right angles to field B. If the radius of circular orbits for both the particles is equal and the kinetic energy acquired by proton is 1 MeV the energy acquired by the alpha particle will be:
A particle moves in a circular path with a uniform speed. Its motion is:
  1. Periodic.
  2. Oscillatory.
  3. Simple harmonic.
  4. Angular simple harmonic.
Coherent sources of light produce constructive interference while there is a phase difference between them is :
The work function of three metals $A , B$ and C are $1.92 eV , 2 eV , 5 eV$ respectively. On the basis of Einstein equation, when radiation of wavelength 4100 Å is used, the emission of electrons will be :
Under what condition will the strength of current in a wire of resistance R be the same for connection is series and in parallel of n identical cells each of the internal resistance r?
In Balmer series of emission spectrum of hydrogen, first four lines with different wavelength $\text{H}\alpha $ $ \text{H}\beta$ $\text{H}\gamma$ and $\text{H}\delta$ are obtained. Which line has maximum frequency out of these?