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concave lens
Convex Lens
refraction lens
None of these
In very cold countries alcohol is used as a thermometric liquid because
In which decade was the telegraph invented?
In which form is the supplied heat energy stored during change in temperature of substance?
In which of the following cases Doppler effect is not seen?
In which of the following industries is mica as a raw material?
In which of the following processes is energy released ?
In which of these transistors, the two segments of n-type semiconductor are separated by a segment of p-type semiconductor?
In which one among the following is the speed of sound maximum ?
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie
In which year, Sir Chandrasekhara Venkata Raman was awarded Nobel Prize for Raman effect?
