MCQ
A signal of $100 \,THz$ frequency can be transmitted with maximum efficiency by
  • A
    Coaxial cable
  • Optical fibre
  • C
    Twisted pair of copper wires
  • D
    Water

Answer

Correct option: B.
Optical fibre
b
Optical fibre frequency range is $1 \,THz$ to $1000 \,THz$.

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

At time $\mathrm{t}=0$ magnetic field of $1000$ Gauss is passing perpendicularly through the area defined by the closed loop shown in the figure. If the magnetic field reduces linearly to $500$ Gauss, in the next $5 \;\mathrm{s}$, then induced $EMF$ in the loop is ........$ \mu \mathrm{V}$
Monochromatic green light of wavelength $5 \times {10^{ - 7}}m$ illuminates a pair of slits $1 \,mm$ apart. The separation of bright lines on the interference pattern formed on a screen $2\, m $ away is......$mm$
Which of the following electromagnetic waves have minimum frequency
The acceleration due to gravity is $g$ at a point distant $r$ from the centre of earth of radius $R$. If $r < R$, then
A $0.5\, kg$ ball is thrown up with an initial speed $14\, m/s$ and reaches a maximum height of $8.0m. $ How much energy is dissipated by air drag acting on the ball during the ascent .......... $J$
Consider a vector $\overrightarrow F = 4\hat i - 3\hat j.$ Another vector that is perpendicular to $\overrightarrow F $ is
Applying the principle of homogeneity of dimensions, determine which one is correct. where $T$ is time period, $G$ is gravitational constant $,M$ is mass $,r$ is radius of orbit.
The wavelength of the carrier waves in a modern optical fiber communication network is close to........$nm$
What is the pressure on a swimmer $20 \,m$ below the surface of water ........ $atm$
Match List $- I$ (Electromagnetic wave type) with List $- II$ (Its association/application) and select the correct option from the choices given below the lists

  લિસ્ટ$-I$   લિસ્ટ$-II$
$a$. Infrared waves $i$. To treat muscular strain
$b$. Radio waves $ii$. For broadcasting
$c$. $X-$rays $iii$. To detect fracture of bones
$d$. Ultraviolet rays $iv$. Absorbed by the ozone layer of the atmosphere

$a$         $b$         $c$         $d$