Question
A white screen illuminated by green and red light appears to be
✓
Answer
( c)From colour triangle
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
If the electric field is given by $(5 \hat{i}+4 \hat{j}+9 \hat{k})$. The electric flux through a surface of area $20$ units lying in the $Y-Z$ plane will be (in units)
→The oscillating magnetic field in a plane electromagnetic wave is given by $B _{ y }=5 \times 10^{-6} \sin$ $1000\,\pi\left(5 x -4 \times 10^{8} t \right) T$. The amplitude of electric field will be.
→A $U-$shaped wire is dipped in a soap solution, and removed. The thin soap film formed between the wire and the light slider supports a weight of $1.5 \times 10^{-2}\; N$ (which includes the small weight of the slider). The length of the slider is $30 \;cm .$ What is the surface tension of the film?
→Given that $1\,g$ of water in liquid phase has volume $1\,cm^3$ and in vapour phase $1671\, cm^3$ at atmospheric pressure and the latent heat of vaporization of water is $2256\,J/g;$ the change in the internal energy in joules for $1\,g$ of water at $373\,K$ when it changes from liquid phase to vapour phase at the same temperature is ....... $J$
→A $220\,\, volt$ input is supplied to a transformer.The output circuit draws a current of $2.0$ $ampere$ at $440$ $volts$. If the efficiency of the transformer is $80\%,$ the current drawn by the primary windings of the transformer is .....$ A$
→If the radius of earth is reduced to three-fourth of its present value without change in its mass then value of duration of the day of earth will be__________.hours $30$ minutes.
→A copper rod of cross-sectional area $A$ carries a uniform current $I$ through it. At temperature $T$, if the volume charge density of the rod is $\rho $, how long will the charges take to travel a distance $d$ ?
→A motorcycle is travelling on a curved track of radius $500\,m$. If the coefficient of friction between road and tyres is $0.5$, the speed avoiding skidding will be ....... $m/s$
→Two circular discs $A$ and $B$ with equal radii and equal mass are blackened. They are heated to same temperature and are cooled under identical conditions.What inference do you draw from their cooling curves ?
→For a toroid $N =500,$ radius $=40 cm ,$ and area of cross section $=$ $10 cm ^{2} .$ Find inductance. (in $\mu H$)
→