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Q. A compound microscope is constructed by arranging two convex lenses so that the objective lens produces a lateral magnification of 130 times and the eyepiece gives an angular magnification of 4.00 times. What is the overall magnification of this microscope?

Q. A long non-conducting cylinder has a charge density p=a*r where a=8 C/m^4 and r is in meters. concentric around it is a hollow metallic cylindrical shell. the cylinder has a radius =5.46 cm and a length of L which is very long compared to the diameter of the shell, neglect edge effects. What is the electric field at 9.4 cm from the central axis?

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