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Instantaneous velocity and speed are explained at a given or particular instant and are shown by ,
formulas about force in detail
A cylindrical metallic wire is stretched to enhance its length by 5%. Measure the percentage change in its resistance.
(i) It having of dissimilar bright lines. (ii) It is given by an excited source in atomic state. (iii)E.g. Spectrum of excited helium, mercury vapours sodium vapours or atomi
What is atomic holography? Atomic holography: Atomic holography has evolved out of the growth of the fundamental elements of atom optics. Along with the Fresnel diffraction
How long will fiber optics last? In case of glass basically indefinitely the inert characteristics of the material. It refers to the actual fiber, but not to the polymer claddi
how faster ultrsonic waves will travel in solids.
This is the virtue of a material resists flow of electric current. It should be as high as possible. When material is subjected to an electrical pressure then will always be a flow
What are lens aberrations? Give reasons for them. Illustrate the working of a simple microscope and give a mathematical expression for its magnifying power.
The power factor of an a.c. circuit is 0.5. What will be the phase difference among voltage and current in this circuit?
A radioactive substance has a half life of 1 min. If one nuclei decays now , when will be next decay????
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