1. Two wires are made of same material. The length of the first wire is half of the second
wire and its diameter is double that of the second wire. If equal loads are applied on both
the wires find the ratio of increase in their lengths.​

Which of the following represents an upside-down image? o a. +doo b. -doo c. +mo d.-m

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? a. alternating b. direct c. straight d. alternating and direct

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?