1st PUC physics Series-2 December 3, 2020December 23, 2020wefru PUC Science 1st Year Physics Series-2 quiz 1 Created on December 02, 2020 By wefru 1st PUC Physics Series 2 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q.11 A lens which converges a beam of parallel rays to a point is called Diverging (or concave) lens Converging (or convex) lens Plano concave lens Plano-convex lens 2 / 10 Q.12 The diameter of a lens is called Aperture Radius of curvature Focal length Principle axis 3 / 10 Q.13 In going from a denser to rarer medium a ray of light is Bent away from the normal Undeviated Bent towards the normal polarised 4 / 10 Q.14 The power of a concave lens is negative Positive Real Virtual 5 / 10 Q.15 Magnifying power of a simple microscope Increases with increase in focal length Increases with the decrease in focal length No effect with decrease or increase with the focal length Least distance of distinct vision 6 / 10 Q.16 Magnification of astronomical telescope is f0/fe f0 fe 0 7 / 10 Q.17 The magnifying power of an astronomical telescope is 10 and the focal length of its eye-piece is 20 cm. The focal length of its objective will be 200 CM 100 CM 145 CM 415 CM 8 / 10 Q.18 The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye-piece is found to be 20 cm. The focal lengths of the lenses are 18 cm, 2 cm 2 cm 18 cm 18 cm, 3 cm 9 / 10 Q.19 In a compound microscope, magnifying power is 95 and the distance of the object from the objective lens is 1/38 cm. The focal length of the objective lens ¼ cm. What is the magnification of eyepiece? 5 55 10 100 10 / 10 Q.20 A hypermetropic person having “near point” at a distance of 0.75 m puts on spectacles of power 2.5 D. The “near point” now is at 20.3 m 0.26 m 2.03 m 60.1 m Your score isThe average score is 20% LinkedIn Facebook Twitter VKontakte 0% Restart quiz