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What are eddy currents? State how their effect is decreased in transformers.
(b) Verify the ef?ciency of a 15 kVA transformer for the following conditions:
(i) full load, unity power factor
(ii) 0.8 full load, unity power factor
(iii) half full load, 0.8 power factor.
Suppose that iron losses are 200Wand the full load copper loss is 300W.
Why are some flashlights brighter than others?
Stretch the fore-finger, central finger and thumb left hand mutually perpendicular. Then if the fore-finger shows in the direction of field and the central in the direction of cu
Microwaves and Radio waves: Microwaves are produced by high frequency electromagnetic oscillators in electric circuits. Microwaves are electromagnetic waves with wavelengths i
O rdinary glass is a good insulator but is too brittle to be used for anything but scientific instrument part s, accumulator container and for certain other special purposes. It is
Examples of like and unlike parallel forces?
define moment of inertia and it''s physical significance
Principle of Cell: To study electrical principles further we require a source of emf. Although an emf can be produced by any of the six methods discussed above, large amounts o
WHY Surface tension increases when an highly soluble SUBSTANCE is dissolved in water WHILE IT DECREASES WHEN an weakly soluble substance is dissolved in water
When two molecules approach each other, the charges in each are disturbed and redistributed in a fashion that the average distance among the unlike charges in the two molecules is
Consider a horizontal cylinder with L/D = large. Imagine this cylinder is filled with a liquid to different levels (consider cases where it is 10, 20, 50, 70, 90% full, note that l
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