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ISC Class XII Board Specimen 2022 : Physics [Semester 2]

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ISC 12th
Indian School Certificate Examination (ISC), New Delhi
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ISC SEMESTER 2 EXAMINATION SPECIMEN QUESTION PAPER PHYSICS PAPER 1 (THEORY) ---------------------------------------------------------------------------------------------------Maximum Marks: 35 Time allowed: One and a half hour Candidates are allowed an additional 10 minutes for only reading the paper. They must NOT start writing during this time. --------------------------------------------------------------------------------------------------------------------- All questions are compulsory. This question paper is divided in 3 Sections A, B and C The intended marks for questions are given in brackets [ ]. All working, including rough work, should be done on the same sheet as and adjacent to the rest of the answer. Answers to sub parts of the same question must be given in one place only. A list of useful physical constants is given at the end of this paper. A simple scientific calculator without a programmable memory may be used for calculations. --------------------------------------------------------------------------------------------------------------------- SECTION A 7 MARKS Question 1 (i) What is meant by a wavefront? [1] (ii) Find the de Broglie wavelength of electrons moving with a speed of 7 10 ms . [1] (iii) State how a p-type semiconductor will be obtained from a pure crystal of a semiconductor. [1] (iv) In case of a regular prism, in minimum deviation position, angle made by the refracted ray (inside the prism) with the normal drawn to the refracting surface is: [1] 6 (a) 90 (b) 60 (c) 45 (d) 30 1 -1

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