MCQ
Mark the correct option of source which is associated with a line emission spectrum:
  • A
    Electric Fire
  • Neon street sign
  • C
    Red traffic light
  • D
    Sun

Answer

Correct option: B.
Neon street sign
Neon lighting consists of brightly glowing, electrified glass tubes or bulbs that contain rarefied neon or other gases.
Neon lights are a type of cold cathode gas$-$discharge light.
Hence neon street sign are associated with line emission spectrum.

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 wire carrying $I$ is shaped as shown. Section $AB$ is a quarter circle of radius $r.$ The magnetic field at $C$ is directed
A container is filled with water $(\mu = 1.33)$ upto a height of $33.25\ cm$. A concave mirror is placed $15\ cm$ above the water level and the image of an object placed at the bottom is formed $25\ cm$ below the water level. The focal length of the mirror is
A Copper $(Cu)$ rod of length $25\, {cm}$ and cross- sectional area $3\, {mm}^{2}$ is joined with a similar Aluminium $(Al)$ rod as shown in figure. Find the resistance of the combination between the ends $A$ and $B$ (in ${m} \Omega$)

(Take Resistivity of Copper $=1.7 \times 10^{-8}\, \Omega \,{m}$, Resistivity of Aluminium $=2.6 \times 10^{-8}\, \Omega \,{m}$ )

The magnifying power of a telescope can be increased by
A photon of $1.7 \times 10^{-13}$ Joules is absorbed by a material under special circumstances. The correct statement is
An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from room temperature 20℃ ? The temperature of boiling water is 100℃
In the circuit shown in the figure, the potential difference across the $4.5\,\mu F$ capacitor is.......$volts$
The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by
The variation of stopping potential $\left(V_0\right)$ as a function of the frequency $(\nu)$ of the incident light for a metal is shown in figure. The work function of the surface is $...........\,eV$
The nuclear reaction $^2H{ + ^2}H \to {\,^4}He$ (mass of deuteron $= 2.0141 \,a.m.u.$ and mass of $He = 4.0024 \,a.m.u.$) is