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Demonstrating how the angle of the sun's rays changes from day to day at the same hour
Cut a 1-cm round hole in a piece of paper or cardboard. Place this in a south window of your classroom where the sun's rays will shine by the hole and strike a piece of white paper on the floor, the table or window sill. Draw the outline of the spot where the beam of light strikes the paper. Write the date and hour inside the outline. Repeat this on succeeding days at exactly the similar hour
What is the Principal value branch of i i Ans) Principal value branch of ii=e-π/2
Illustrate the working of Optical-Fiber Infrasound Sensors. Optical-Fiber Infrasound Sensors: It is example of Mach-Zchnder Interferrometer. Optical-fiber infrasound sensors
Describe with the help of a labelled diagram the underlying principle and working of a step-up transformer. Why cannot such a device be used to step-up D.C. voltage? Or Dr
Explain the exact process of Neodymium-Yttrium-Aluminium-Garnet Laser. While the flash lamp is switched start, the intense beam of white light through the lamp excites the Nd3+
(i)Most of the alpha-particles pass by the foil straight away undeflected. (ii)Some of them are deflected by small angles. (iii)A few alpha-particles (1 in 1000) are deflecte
Cathode rays, discovered by Sir Willium Crooke are the stream of electrons. They may be given by using a discharge tube containing gas at a low pressure of the order of 10-2 mm of
A metal rod of mass 10 g and length 10 cm is placed on a smooth 60 degree incline. A uniform magnetic field B is applied in the region vertically downwards . If a current of 3 A is
The equation of an equipotential line in an electric field is y=2x then the electric field strength vector at (1,2) may be?
What is an intrinsic semiconductor? How can this material be changed into (i) P-type (ii) N-type extrinsic semiconductor? Describe with the help of energy band diagrams
A popular toy on the market some years ago was the water rocket. Water (at 10°C) was loaded into a plastic rocket and pressurized with a hand pump. The rocket was released and woul
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