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Q. What are the various energy losses of a transformer? Energy losses in a transformer: (a) Hysteresis loss (b Copper loss (c) Eddy current loss (Iron loss) (d)
Q. Define roentgen and activity and Curie? One roentgen (1R) is described as the quantity of radiation which produces 1.6 × 10 12 pairs of ions in 1 gram of air. The activi
A light ray is reflected off a plane mirror at an angle of 25° from the normal. A light ray from another source is reflected 54° from the normal. What is the dissimilarity i
a metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a load of 8.00 kg is hung on its end. find the stress, the strain and the young''s modulud for the mater
Q State Lenz's law. Lenz's law declares that the induced current produced in a circuit always flows in such a direction that it opposes the change or cause that produces it.
Radiography and depletion of Ozone layer: What is Radiography? A. The method in which soft X-rays are used in medical diagnosis is called radiography. What are the uses
Photoelectric electricity is produced directly from solar energy when which following are absorbed in a semiconductor to create an electric current? a) Protons b) Electron
Show the ray diagram showing the experimental arrangement for pure spectrum.
(a) You have studied that plane and convex mirrors produce virtual images of objects. Can they generate real image under some circumstances? Explain. (b) A virtual image we a
Rutherford's alpha-scattering experiment recognized that the mass of atom is concentrated with small positively charged region at the centre which is known as 'nucleus'. Nuclei
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