Explain the index of refraction of air?
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what is difference b/w scr &rectifier&mechanism of triac experiment
hmmm by using of our saliva we can produce current?
What is meant by reflection of waves?
It is easier to knock a man down when he is standing on one leg than when he stands on two legs. Why ?
How increasing threshold voltage can affect on current in transistor?
Why in cold countries, the water at the surface freezes and in the inner portion it is in the sate of water ?
in one optical instrument, what is the effect of usingtwo converging lenses?
At what temperature does the filament of electric bulb glows ?
How much should be the minimum size of the ordinary mirror, so that and observer standing at the centre of room is able to see the whole of the height of the wall behind him ?
discuss the statement "almost all the energy from a cars engine ultimately goes to pushing air around and heating the brakes"
Why is it that the nearer we approach the sun, the colder it becomes ?
what are the passive two-wire elements?