Download App

STD 12 - Communication — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - Communication4 Marks
MCQ
A modulating signal is a square wave, as shown in the figure.
If the carrier wave is given as $c ( t )=2 \sin (8 \pi t )$ volts, the modulation index is:
  • A
    $0.25$
  • B
    $1$
  • C
    $0.75$
  • ✓
    $0.5$
✓

Answer

Correct option: D.
$0.5$
d
Modulation index

$=\frac{\text { Amplitude of mod ulating signal }}{\text { Amplitude of carrier wave }}$

$\mu=\frac{1}{2}$

$=0.5$

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

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The figure shows the cross section of a long cylindrical conductor through which an axial hole of radius $r$ is drilled with its centre at point $A$ . $O$ is the centre of the conductor. If an identical hole were to be drilled centred at point $B$ while maintaining the same current density the magnitude of magnetic field at $O$ 
→
The current in the windings of a toroid is $2.0\,A$. There are $400\,turns$ and the mean circumferential length is $40\,cm$. If the inside magnetic field is $1.0\,T,$ the relative permeability is near to
→
A train of $150$ metre length is going towards north direction at a speed of $10\; m / s$. A parrot flies at the speed of $5\; m / s$ towards south direction parallel to the railways track. The time taken by the parrot to cross the train is
→
The capacity of a parallel plate condenser is $15\,\mu \,F$, when the distance between its plates is $6 \,cm$. If the distance between the plates is reduced to $2\, cm$, then the capacity of this parallel plate condenser will be......$\mu \,F$
→
A $\vec F\,\, = \,\,\hat i\, + \,4\hat j\,$ acts on block shown. The force of friction acting on the block is :
→
In the disintegration series the $_{92}^{238}U\xrightarrow{\alpha }X\xrightarrow{{\beta  - }}_Z^AY$ values of $Z$ and $A$ respectively will be
→
A circular coil having $200$ turns, $2.5 \times 10^{-4} \mathrm{~m}^2$ area and carrying $100 \mu \mathrm{A}$ current is placed in a uniform magnetic field of $1 \mathrm{~T}$. Initially the magnetic dipole moment $(\vec{M})$ was directed along $\vec{B}$. Amount of work, required to rotate the coil through $90^{\circ}$ from its initial orientation such that $\overrightarrow{\mathrm{M}}$ becomes perpendicular to $\vec{B}$, is. . . . $\mu \mathrm{J}$.
→
Work of moderator is
→
The primary and the secondary coils of a transformer contain $10$ and $100$ turns, respectively. The primary coil is connected to a battery that supplies a constant voltage of $1.5 \,V$. The voltage across the secondary coil is .................. $V$
→
The graph shows how the magnification $m$ produced by a convex thin lens varies with image distance $v$. What was the focal length of the used
→