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PHYSOL-2 REVISION EXAMINATION SERIES, +2 PHYSICS CHAPTER 8,9 & 10, SUNDAY 06-03-2022 @ 7.00pm, P2R-4, TIME: 1 HOUR, MAXIMUM SCORE:30, General Instructions to Students, There is a 'cool-off time' of 10 minutes in addition to maximum writing time, • Use cool-off time to get familiarise with questions and their answers, • Read questions and instructions carefully before answering, • Calculations, figures, graphs should be shown in the answer sheet itself, • You can write questions from Part A & Part B to get a maximum score of 30, Electronic devices except non-programmable calculators are not allowed in the examination, Part-I, A. Answer any three questions from 1 to 4. Each carries 1 score., 1, The current due to time varying electric field is called.., 1, ......., For a concave mirror focal length is, focal length is, The diverging lens is called..., 2, (positive/negative) and for a convex mirror, 1, · (positive/negative), 3, 1, The shape of wavefront originating from a near point source, |(i) Plane (ii) Circular (iii) Cylindrical (iv) Spherical, 4, 1, B. Answer all questions from 5 to 6. Each carries 1 score, 5 Mirage is an optical illusion seen in deserts. The phenomenon behind mirage is... ..., 1, The phenomenon of bending of light around the edges of an obstacle is called, |(a) Diffraction., 6., 1, (b) Polarisation, (c) Interference, (d) Scattering, Part-II, A. Answer any two questions from 7 to 9. Each carries 2 scores, State Huygens Principle., 7, 2, 8, Obtain the relation R = 2f for a concave mirror where R and f have their usual meaning, 9, Derive the Mirror formula for a concave mirror, 2, B. Answer any two questions from 10 to 13. Each carries 2 scores., 10 a) Give a relationship between critical angle and refractive index of the denser medium., b), 2, critical angle for diamond is 30°. What is its refractive inc, 11, Match the following:, А, В, X-гаys, Water purifier, 2, Infrared, Cancer treatment, Microwave, Remote switch, Ultraviolet, Radar, 12 Sound waves can diffract around a building, but light waves cannot. Why?, 13 What are the differences between interference and diffraction?, PHYSOL-2-The solution for learning Physics, Prepared by Higher Secondary Physics Teachers Association Malappuram

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Part-III, A. Answer any three questions from 14 to 17. Each carries 3 scores., 14 Draw a labelled diagram for image formation in a compound microscope and write an, expression for its magnification, 15 a) State the laws of refraction., 1, b) Draw the passage of light ray, 1) entering from denser medium to rarer medium, 2) Entering from rarer medium to denser medium, 2, 16 (a) State and Prove Brewster's law., (b) What should be the angle of incidence so that the reflected and refracted rays are, perpendicular to each other? (Given n=1.5), 1.5, 1.5, 17, Derive the Lens Maker's formula, B. Answer the following question. Carries 3 scores, Prove the law of refraction for a plane wave front using Huygens Principle., 18, Part-IV, A. Answer any one question from 19 to 20. Each carries 5 scores., 19 Draw the ray diagram showing refraction of light through a glass prism and hence obtain the, relation between the refractive index of the prism, angle of prism and angle of minimum, deviation., 20 a) Interference of light waves produce alternate dark and bright regions called fringes. Using, a schematic diagram derive an expression for the fringe width in Young's double slit, experiment., b) If Yong's double slit experiment is conducted inside water, what will happen to fringe 1, width?, 4, Best wishes to all, HSPTA, MALAPPURM, PHYSOL-2-The solution for learning Physics, Prepared by Higher Secondary Physics Teachers Association Malappuram, 3.