Q 1 .Give two examples of formation of real image from your daily life.
Q 2 .Name the mirror that has virtual focus.
Q 3.Draw a ray diagram to explain sign convention for lenses.
Q4 .Magnification of a mirror is -5.What all information can you infer from this?Draw a posssible ray diagram for the same.
Q 5 .What is meant by power of a lens ?
Q 6.Why do all predaters have their eyes at the front of their head?
Q 7. A then converging lens forms (a)real image (b)virtual image of an object placed in front of it. the size of the image is three times the size of the object in each case.Draw ray diagrams for both the cases.How will the focal lenth of such a lens be affected on cutting it into two halves along the principle axis?
Q 8 .The applied potential difference across a given resister is altered so that the heat produced per second increases by a factor of 16 .By what factor has the applied potential difference changed?
Q 9 . What are magnetic field lines ? Give any two of its properties.
Q 10.A concave lens made of a material of ref. index n1 is kept in a medium of ref.index n2 .A parallel beam of light is incident on the lens.
Complete the path of rays of light
