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Q. Compute the resistance of the filament of a 100W, 220 V electric bulbs.
Power P = V2/R Resistance R = V2/P = (220 X 220)/ 100 = 484 ohm.
how faster ultrsonic waves will travel in solids.
why horse shoe magnet is use in galvanometer
1+1
a) Sketch the small-signal equivalent circuit for a field-effect transistor (FET) and explain how it can be deduced from the properties of the real device. b) Draw the circuit
Q. What is a frame of reference? A system of co-ordinate axes which describe the position of a particle in two or three dimensional space is called a frame of reference.
how to make a ray diagram ?? and what are f, p ?? and what is refraction index?????
Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: a) red light is focused more strongly than blue light b)
Figure shows the magnetic circuit of a relay. When each of the air gaps are 1.5mm wide find the mmf required to produce a flux density of 0.75 T in the air gaps. Use the B-
a) What is the magnitude of a point electric charge chosen so that the electric field because of it at a point 50 cm away has magnitude 2.0 NC¯¹ ? (b) Get a mathematical expre
A steam bath An evaporating dish and steam bath can be contrived from a saucer and a tin. Scallops are cut out of the top of the tin to permit the steam to escape
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